fix output

2026-01-27 16:47:33 +03:30
parent c122b00647
commit a99c6aa051
4582 changed files with 389930 additions and 2514 deletions
@@ -0,0 +1,25 @@
+import { ValueSetter } from "./Setter.js";
+
+export class Parser {
+  run(dateString, token, match, options) {
+    const result = this.parse(dateString, token, match, options);
+    if (!result) {
+      return null;
+    }
+
+    return {
+      setter: new ValueSetter(
+        result.value,
+        this.validate,
+        this.set,
+        this.priority,
+        this.subPriority,
+      ),
+      rest: result.rest,
+    };
+  }
+
+  validate(_utcDate, _value, _options) {
+    return true;
+  }
+}
@@ -0,0 +1,57 @@
+import { constructFrom } from "../../constructFrom.js";
+import { transpose } from "../../transpose.js";
+
+const TIMEZONE_UNIT_PRIORITY = 10;
+
+export class Setter {
+  subPriority = 0;
+
+  validate(_utcDate, _options) {
+    return true;
+  }
+}
+
+export class ValueSetter extends Setter {
+  constructor(
+    value,
+
+    validateValue,
+
+    setValue,
+
+    priority,
+    subPriority,
+  ) {
+    super();
+    this.value = value;
+    this.validateValue = validateValue;
+    this.setValue = setValue;
+    this.priority = priority;
+    if (subPriority) {
+      this.subPriority = subPriority;
+    }
+  }
+
+  validate(date, options) {
+    return this.validateValue(date, this.value, options);
+  }
+
+  set(date, flags, options) {
+    return this.setValue(date, flags, this.value, options);
+  }
+}
+
+export class DateTimezoneSetter extends Setter {
+  priority = TIMEZONE_UNIT_PRIORITY;
+  subPriority = -1;
+
+  constructor(context, reference) {
+    super();
+    this.context = context || ((date) => constructFrom(reference, date));
+  }
+
+  set(date, flags) {
+    if (flags.timestampIsSet) return date;
+    return constructFrom(date, transpose(date, this.context));
+  }
+}
@@ -0,0 +1,31 @@
+export const numericPatterns = {
+  month: /^(1[0-2]|0?\d)/, // 0 to 12
+  date: /^(3[0-1]|[0-2]?\d)/, // 0 to 31
+  dayOfYear: /^(36[0-6]|3[0-5]\d|[0-2]?\d?\d)/, // 0 to 366
+  week: /^(5[0-3]|[0-4]?\d)/, // 0 to 53
+  hour23h: /^(2[0-3]|[0-1]?\d)/, // 0 to 23
+  hour24h: /^(2[0-4]|[0-1]?\d)/, // 0 to 24
+  hour11h: /^(1[0-1]|0?\d)/, // 0 to 11
+  hour12h: /^(1[0-2]|0?\d)/, // 0 to 12
+  minute: /^[0-5]?\d/, // 0 to 59
+  second: /^[0-5]?\d/, // 0 to 59
+
+  singleDigit: /^\d/, // 0 to 9
+  twoDigits: /^\d{1,2}/, // 0 to 99
+  threeDigits: /^\d{1,3}/, // 0 to 999
+  fourDigits: /^\d{1,4}/, // 0 to 9999
+
+  anyDigitsSigned: /^-?\d+/,
+  singleDigitSigned: /^-?\d/, // 0 to 9, -0 to -9
+  twoDigitsSigned: /^-?\d{1,2}/, // 0 to 99, -0 to -99
+  threeDigitsSigned: /^-?\d{1,3}/, // 0 to 999, -0 to -999
+  fourDigitsSigned: /^-?\d{1,4}/, // 0 to 9999, -0 to -9999
+};
+
+export const timezonePatterns = {
+  basicOptionalMinutes: /^([+-])(\d{2})(\d{2})?|Z/,
+  basic: /^([+-])(\d{2})(\d{2})|Z/,
+  basicOptionalSeconds: /^([+-])(\d{2})(\d{2})((\d{2}))?|Z/,
+  extended: /^([+-])(\d{2}):(\d{2})|Z/,
+  extendedOptionalSeconds: /^([+-])(\d{2}):(\d{2})(:(\d{2}))?|Z/,
+};
@@ -0,0 +1,108 @@
+import { EraParser } from "./parsers/EraParser.js";
+import { YearParser } from "./parsers/YearParser.js";
+import { LocalWeekYearParser } from "./parsers/LocalWeekYearParser.js";
+import { ISOWeekYearParser } from "./parsers/ISOWeekYearParser.js";
+import { ExtendedYearParser } from "./parsers/ExtendedYearParser.js";
+import { QuarterParser } from "./parsers/QuarterParser.js";
+import { StandAloneQuarterParser } from "./parsers/StandAloneQuarterParser.js";
+import { MonthParser } from "./parsers/MonthParser.js";
+import { StandAloneMonthParser } from "./parsers/StandAloneMonthParser.js";
+import { LocalWeekParser } from "./parsers/LocalWeekParser.js";
+import { ISOWeekParser } from "./parsers/ISOWeekParser.js";
+import { DateParser } from "./parsers/DateParser.js";
+import { DayOfYearParser } from "./parsers/DayOfYearParser.js";
+import { DayParser } from "./parsers/DayParser.js";
+import { LocalDayParser } from "./parsers/LocalDayParser.js";
+import { StandAloneLocalDayParser } from "./parsers/StandAloneLocalDayParser.js";
+import { ISODayParser } from "./parsers/ISODayParser.js";
+import { AMPMParser } from "./parsers/AMPMParser.js";
+import { AMPMMidnightParser } from "./parsers/AMPMMidnightParser.js";
+import { DayPeriodParser } from "./parsers/DayPeriodParser.js";
+import { Hour1to12Parser } from "./parsers/Hour1to12Parser.js";
+import { Hour0to23Parser } from "./parsers/Hour0to23Parser.js";
+import { Hour0To11Parser } from "./parsers/Hour0To11Parser.js";
+import { Hour1To24Parser } from "./parsers/Hour1To24Parser.js";
+import { MinuteParser } from "./parsers/MinuteParser.js";
+import { SecondParser } from "./parsers/SecondParser.js";
+import { FractionOfSecondParser } from "./parsers/FractionOfSecondParser.js";
+import { ISOTimezoneWithZParser } from "./parsers/ISOTimezoneWithZParser.js";
+import { ISOTimezoneParser } from "./parsers/ISOTimezoneParser.js";
+import { TimestampSecondsParser } from "./parsers/TimestampSecondsParser.js";
+import { TimestampMillisecondsParser } from "./parsers/TimestampMillisecondsParser.js";
+
+/*
+ * |     | Unit                           |     | Unit                           |
+ * |-----|--------------------------------|-----|--------------------------------|
+ * |  a  | AM, PM                         |  A* | Milliseconds in day            |
+ * |  b  | AM, PM, noon, midnight         |  B  | Flexible day period            |
+ * |  c  | Stand-alone local day of week  |  C* | Localized hour w/ day period   |
+ * |  d  | Day of month                   |  D  | Day of year                    |
+ * |  e  | Local day of week              |  E  | Day of week                    |
+ * |  f  |                                |  F* | Day of week in month           |
+ * |  g* | Modified Julian day            |  G  | Era                            |
+ * |  h  | Hour [1-12]                    |  H  | Hour [0-23]                    |
+ * |  i! | ISO day of week                |  I! | ISO week of year               |
+ * |  j* | Localized hour w/ day period   |  J* | Localized hour w/o day period  |
+ * |  k  | Hour [1-24]                    |  K  | Hour [0-11]                    |
+ * |  l* | (deprecated)                   |  L  | Stand-alone month              |
+ * |  m  | Minute                         |  M  | Month                          |
+ * |  n  |                                |  N  |                                |
+ * |  o! | Ordinal number modifier        |  O* | Timezone (GMT)                 |
+ * |  p  |                                |  P  |                                |
+ * |  q  | Stand-alone quarter            |  Q  | Quarter                        |
+ * |  r* | Related Gregorian year         |  R! | ISO week-numbering year        |
+ * |  s  | Second                         |  S  | Fraction of second             |
+ * |  t! | Seconds timestamp              |  T! | Milliseconds timestamp         |
+ * |  u  | Extended year                  |  U* | Cyclic year                    |
+ * |  v* | Timezone (generic non-locat.)  |  V* | Timezone (location)            |
+ * |  w  | Local week of year             |  W* | Week of month                  |
+ * |  x  | Timezone (ISO-8601 w/o Z)      |  X  | Timezone (ISO-8601)            |
+ * |  y  | Year (abs)                     |  Y  | Local week-numbering year      |
+ * |  z* | Timezone (specific non-locat.) |  Z* | Timezone (aliases)             |
+ *
+ * Letters marked by * are not implemented but reserved by Unicode standard.
+ *
+ * Letters marked by ! are non-standard, but implemented by date-fns:
+ * - `o` modifies the previous token to turn it into an ordinal (see `parse` docs)
+ * - `i` is ISO day of week. For `i` and `ii` is returns numeric ISO week days,
+ *   i.e. 7 for Sunday, 1 for Monday, etc.
+ * - `I` is ISO week of year, as opposed to `w` which is local week of year.
+ * - `R` is ISO week-numbering year, as opposed to `Y` which is local week-numbering year.
+ *   `R` is supposed to be used in conjunction with `I` and `i`
+ *   for universal ISO week-numbering date, whereas
+ *   `Y` is supposed to be used in conjunction with `w` and `e`
+ *   for week-numbering date specific to the locale.
+ */
+export const parsers = {
+  G: new EraParser(),
+  y: new YearParser(),
+  Y: new LocalWeekYearParser(),
+  R: new ISOWeekYearParser(),
+  u: new ExtendedYearParser(),
+  Q: new QuarterParser(),
+  q: new StandAloneQuarterParser(),
+  M: new MonthParser(),
+  L: new StandAloneMonthParser(),
+  w: new LocalWeekParser(),
+  I: new ISOWeekParser(),
+  d: new DateParser(),
+  D: new DayOfYearParser(),
+  E: new DayParser(),
+  e: new LocalDayParser(),
+  c: new StandAloneLocalDayParser(),
+  i: new ISODayParser(),
+  a: new AMPMParser(),
+  b: new AMPMMidnightParser(),
+  B: new DayPeriodParser(),
+  h: new Hour1to12Parser(),
+  H: new Hour0to23Parser(),
+  K: new Hour0To11Parser(),
+  k: new Hour1To24Parser(),
+  m: new MinuteParser(),
+  s: new SecondParser(),
+  S: new FractionOfSecondParser(),
+  X: new ISOTimezoneWithZParser(),
+  x: new ISOTimezoneParser(),
+  t: new TimestampSecondsParser(),
+  T: new TimestampMillisecondsParser(),
+};
@@ -0,0 +1,54 @@
+import { Parser } from "../Parser.js";
+
+import { dayPeriodEnumToHours } from "../utils.js";
+
+export class AMPMMidnightParser extends Parser {
+  priority = 80;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "b":
+      case "bb":
+      case "bbb":
+        return (
+          match.dayPeriod(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+
+      case "bbbbb":
+        return match.dayPeriod(dateString, {
+          width: "narrow",
+          context: "formatting",
+        });
+      case "bbbb":
+      default:
+        return (
+          match.dayPeriod(dateString, {
+            width: "wide",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+    }
+  }
+
+  set(date, _flags, value) {
+    date.setHours(dayPeriodEnumToHours(value), 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["a", "B", "H", "k", "t", "T"];
+}
@@ -0,0 +1,54 @@
+import { Parser } from "../Parser.js";
+
+import { dayPeriodEnumToHours } from "../utils.js";
+
+export class AMPMParser extends Parser {
+  priority = 80;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "a":
+      case "aa":
+      case "aaa":
+        return (
+          match.dayPeriod(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+
+      case "aaaaa":
+        return match.dayPeriod(dateString, {
+          width: "narrow",
+          context: "formatting",
+        });
+      case "aaaa":
+      default:
+        return (
+          match.dayPeriod(dateString, {
+            width: "wide",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+    }
+  }
+
+  set(date, _flags, value) {
+    date.setHours(dayPeriodEnumToHours(value), 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["b", "B", "H", "k", "t", "T"];
+}
@@ -0,0 +1,62 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import {
+  isLeapYearIndex,
+  parseNDigits,
+  parseNumericPattern,
+} from "../utils.js";
+
+const DAYS_IN_MONTH = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
+const DAYS_IN_MONTH_LEAP_YEAR = [
+  31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
+];
+
+// Day of the month
+export class DateParser extends Parser {
+  priority = 90;
+  subPriority = 1;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "d":
+        return parseNumericPattern(numericPatterns.date, dateString);
+      case "do":
+        return match.ordinalNumber(dateString, { unit: "date" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(date, value) {
+    const year = date.getFullYear();
+    const isLeapYear = isLeapYearIndex(year);
+    const month = date.getMonth();
+    if (isLeapYear) {
+      return value >= 1 && value <= DAYS_IN_MONTH_LEAP_YEAR[month];
+    } else {
+      return value >= 1 && value <= DAYS_IN_MONTH[month];
+    }
+  }
+
+  set(date, _flags, value) {
+    date.setDate(value);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "Y",
+    "R",
+    "q",
+    "Q",
+    "w",
+    "I",
+    "D",
+    "i",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,60 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import {
+  isLeapYearIndex,
+  parseNDigits,
+  parseNumericPattern,
+} from "../utils.js";
+
+export class DayOfYearParser extends Parser {
+  priority = 90;
+
+  subpriority = 1;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "D":
+      case "DD":
+        return parseNumericPattern(numericPatterns.dayOfYear, dateString);
+      case "Do":
+        return match.ordinalNumber(dateString, { unit: "date" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(date, value) {
+    const year = date.getFullYear();
+    const isLeapYear = isLeapYearIndex(year);
+    if (isLeapYear) {
+      return value >= 1 && value <= 366;
+    } else {
+      return value >= 1 && value <= 365;
+    }
+  }
+
+  set(date, _flags, value) {
+    date.setMonth(0, value);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "Y",
+    "R",
+    "q",
+    "Q",
+    "M",
+    "L",
+    "w",
+    "I",
+    "d",
+    "E",
+    "i",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,62 @@
+import { setDay } from "../../../setDay.js";
+import { Parser } from "../Parser.js";
+
+// Day of week
+export class DayParser extends Parser {
+  priority = 90;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      // Tue
+      case "E":
+      case "EE":
+      case "EEE":
+        return (
+          match.day(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.day(dateString, { width: "short", context: "formatting" }) ||
+          match.day(dateString, { width: "narrow", context: "formatting" })
+        );
+
+      // T
+      case "EEEEE":
+        return match.day(dateString, {
+          width: "narrow",
+          context: "formatting",
+        });
+      // Tu
+      case "EEEEEE":
+        return (
+          match.day(dateString, { width: "short", context: "formatting" }) ||
+          match.day(dateString, { width: "narrow", context: "formatting" })
+        );
+
+      // Tuesday
+      case "EEEE":
+      default:
+        return (
+          match.day(dateString, { width: "wide", context: "formatting" }) ||
+          match.day(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.day(dateString, { width: "short", context: "formatting" }) ||
+          match.day(dateString, { width: "narrow", context: "formatting" })
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 6;
+  }
+
+  set(date, _flags, value, options) {
+    date = setDay(date, value, options);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["D", "i", "e", "c", "t", "T"];
+}
@@ -0,0 +1,55 @@
+import { Parser } from "../Parser.js";
+
+import { dayPeriodEnumToHours } from "../utils.js";
+
+// in the morning, in the afternoon, in the evening, at night
+export class DayPeriodParser extends Parser {
+  priority = 80;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "B":
+      case "BB":
+      case "BBB":
+        return (
+          match.dayPeriod(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+
+      case "BBBBB":
+        return match.dayPeriod(dateString, {
+          width: "narrow",
+          context: "formatting",
+        });
+      case "BBBB":
+      default:
+        return (
+          match.dayPeriod(dateString, {
+            width: "wide",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.dayPeriod(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+    }
+  }
+
+  set(date, _flags, value) {
+    date.setHours(dayPeriodEnumToHours(value), 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["a", "b", "t", "T"];
+}
@@ -0,0 +1,39 @@
+import { Parser } from "../Parser.js";
+
+export class EraParser extends Parser {
+  priority = 140;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      // AD, BC
+      case "G":
+      case "GG":
+      case "GGG":
+        return (
+          match.era(dateString, { width: "abbreviated" }) ||
+          match.era(dateString, { width: "narrow" })
+        );
+
+      // A, B
+      case "GGGGG":
+        return match.era(dateString, { width: "narrow" });
+      // Anno Domini, Before Christ
+      case "GGGG":
+      default:
+        return (
+          match.era(dateString, { width: "wide" }) ||
+          match.era(dateString, { width: "abbreviated" }) ||
+          match.era(dateString, { width: "narrow" })
+        );
+    }
+  }
+
+  set(date, flags, value) {
+    flags.era = value;
+    date.setFullYear(value, 0, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["R", "u", "t", "T"];
+}
@@ -0,0 +1,23 @@
+import { Parser } from "../Parser.js";
+
+import { parseNDigitsSigned } from "../utils.js";
+
+export class ExtendedYearParser extends Parser {
+  priority = 130;
+
+  parse(dateString, token) {
+    if (token === "u") {
+      return parseNDigitsSigned(4, dateString);
+    }
+
+    return parseNDigitsSigned(token.length, dateString);
+  }
+
+  set(date, _flags, value) {
+    date.setFullYear(value, 0, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["G", "y", "Y", "R", "w", "I", "i", "e", "c", "t", "T"];
+}
@@ -0,0 +1,20 @@
+import { Parser } from "../Parser.js";
+
+import { mapValue, parseNDigits } from "../utils.js";
+
+export class FractionOfSecondParser extends Parser {
+  priority = 30;
+
+  parse(dateString, token) {
+    const valueCallback = (value) =>
+      Math.trunc(value * Math.pow(10, -token.length + 3));
+    return mapValue(parseNDigits(token.length, dateString), valueCallback);
+  }
+
+  set(date, _flags, value) {
+    date.setMilliseconds(value);
+    return date;
+  }
+
+  incompatibleTokens = ["t", "T"];
+}
@@ -0,0 +1,35 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class Hour0To11Parser extends Parser {
+  priority = 70;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "K":
+        return parseNumericPattern(numericPatterns.hour11h, dateString);
+      case "Ko":
+        return match.ordinalNumber(dateString, { unit: "hour" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 11;
+  }
+
+  set(date, _flags, value) {
+    const isPM = date.getHours() >= 12;
+    if (isPM && value < 12) {
+      date.setHours(value + 12, 0, 0, 0);
+    } else {
+      date.setHours(value, 0, 0, 0);
+    }
+    return date;
+  }
+
+  incompatibleTokens = ["h", "H", "k", "t", "T"];
+}
@@ -0,0 +1,30 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class Hour0to23Parser extends Parser {
+  priority = 70;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "H":
+        return parseNumericPattern(numericPatterns.hour23h, dateString);
+      case "Ho":
+        return match.ordinalNumber(dateString, { unit: "hour" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 23;
+  }
+
+  set(date, _flags, value) {
+    date.setHours(value, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["a", "b", "h", "K", "k", "t", "T"];
+}
@@ -0,0 +1,31 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class Hour1To24Parser extends Parser {
+  priority = 70;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "k":
+        return parseNumericPattern(numericPatterns.hour24h, dateString);
+      case "ko":
+        return match.ordinalNumber(dateString, { unit: "hour" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 1 && value <= 24;
+  }
+
+  set(date, _flags, value) {
+    const hours = value <= 24 ? value % 24 : value;
+    date.setHours(hours, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["a", "b", "h", "H", "K", "t", "T"];
+}
@@ -0,0 +1,37 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class Hour1to12Parser extends Parser {
+  priority = 70;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "h":
+        return parseNumericPattern(numericPatterns.hour12h, dateString);
+      case "ho":
+        return match.ordinalNumber(dateString, { unit: "hour" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 1 && value <= 12;
+  }
+
+  set(date, _flags, value) {
+    const isPM = date.getHours() >= 12;
+    if (isPM && value < 12) {
+      date.setHours(value + 12, 0, 0, 0);
+    } else if (!isPM && value === 12) {
+      date.setHours(0, 0, 0, 0);
+    } else {
+      date.setHours(value, 0, 0, 0);
+    }
+    return date;
+  }
+
+  incompatibleTokens = ["H", "K", "k", "t", "T"];
+}
@@ -0,0 +1,117 @@
+import { setISODay } from "../../../setISODay.js";
+import { Parser } from "../Parser.js";
+
+import { mapValue, parseNDigits } from "../utils.js";
+
+// ISO day of week
+export class ISODayParser extends Parser {
+  priority = 90;
+
+  parse(dateString, token, match) {
+    const valueCallback = (value) => {
+      if (value === 0) {
+        return 7;
+      }
+      return value;
+    };
+
+    switch (token) {
+      // 2
+      case "i":
+      case "ii": // 02
+        return parseNDigits(token.length, dateString);
+      // 2nd
+      case "io":
+        return match.ordinalNumber(dateString, { unit: "day" });
+      // Tue
+      case "iii":
+        return mapValue(
+          match.day(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+            match.day(dateString, {
+              width: "short",
+              context: "formatting",
+            }) ||
+            match.day(dateString, {
+              width: "narrow",
+              context: "formatting",
+            }),
+          valueCallback,
+        );
+      // T
+      case "iiiii":
+        return mapValue(
+          match.day(dateString, {
+            width: "narrow",
+            context: "formatting",
+          }),
+          valueCallback,
+        );
+      // Tu
+      case "iiiiii":
+        return mapValue(
+          match.day(dateString, {
+            width: "short",
+            context: "formatting",
+          }) ||
+            match.day(dateString, {
+              width: "narrow",
+              context: "formatting",
+            }),
+          valueCallback,
+        );
+      // Tuesday
+      case "iiii":
+      default:
+        return mapValue(
+          match.day(dateString, {
+            width: "wide",
+            context: "formatting",
+          }) ||
+            match.day(dateString, {
+              width: "abbreviated",
+              context: "formatting",
+            }) ||
+            match.day(dateString, {
+              width: "short",
+              context: "formatting",
+            }) ||
+            match.day(dateString, {
+              width: "narrow",
+              context: "formatting",
+            }),
+          valueCallback,
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 1 && value <= 7;
+  }
+
+  set(date, _flags, value) {
+    date = setISODay(date, value);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "y",
+    "Y",
+    "u",
+    "q",
+    "Q",
+    "M",
+    "L",
+    "w",
+    "d",
+    "D",
+    "E",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,46 @@
+import { constructFrom } from "../../../constructFrom.js";
+import { getTimezoneOffsetInMilliseconds } from "../../../_lib/getTimezoneOffsetInMilliseconds.js";
+import { timezonePatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseTimezonePattern } from "../utils.js";
+
+// Timezone (ISO-8601)
+export class ISOTimezoneParser extends Parser {
+  priority = 10;
+
+  parse(dateString, token) {
+    switch (token) {
+      case "x":
+        return parseTimezonePattern(
+          timezonePatterns.basicOptionalMinutes,
+          dateString,
+        );
+      case "xx":
+        return parseTimezonePattern(timezonePatterns.basic, dateString);
+      case "xxxx":
+        return parseTimezonePattern(
+          timezonePatterns.basicOptionalSeconds,
+          dateString,
+        );
+      case "xxxxx":
+        return parseTimezonePattern(
+          timezonePatterns.extendedOptionalSeconds,
+          dateString,
+        );
+      case "xxx":
+      default:
+        return parseTimezonePattern(timezonePatterns.extended, dateString);
+    }
+  }
+
+  set(date, flags, value) {
+    if (flags.timestampIsSet) return date;
+    return constructFrom(
+      date,
+      date.getTime() - getTimezoneOffsetInMilliseconds(date) - value,
+    );
+  }
+
+  incompatibleTokens = ["t", "T", "X"];
+}
@@ -0,0 +1,46 @@
+import { constructFrom } from "../../../constructFrom.js";
+import { getTimezoneOffsetInMilliseconds } from "../../../_lib/getTimezoneOffsetInMilliseconds.js";
+import { timezonePatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseTimezonePattern } from "../utils.js";
+
+// Timezone (ISO-8601. +00:00 is `'Z'`)
+export class ISOTimezoneWithZParser extends Parser {
+  priority = 10;
+
+  parse(dateString, token) {
+    switch (token) {
+      case "X":
+        return parseTimezonePattern(
+          timezonePatterns.basicOptionalMinutes,
+          dateString,
+        );
+      case "XX":
+        return parseTimezonePattern(timezonePatterns.basic, dateString);
+      case "XXXX":
+        return parseTimezonePattern(
+          timezonePatterns.basicOptionalSeconds,
+          dateString,
+        );
+      case "XXXXX":
+        return parseTimezonePattern(
+          timezonePatterns.extendedOptionalSeconds,
+          dateString,
+        );
+      case "XXX":
+      default:
+        return parseTimezonePattern(timezonePatterns.extended, dateString);
+    }
+  }
+
+  set(date, flags, value) {
+    if (flags.timestampIsSet) return date;
+    return constructFrom(
+      date,
+      date.getTime() - getTimezoneOffsetInMilliseconds(date) - value,
+    );
+  }
+
+  incompatibleTokens = ["t", "T", "x"];
+}
@@ -0,0 +1,47 @@
+import { setISOWeek } from "../../../setISOWeek.js";
+import { startOfISOWeek } from "../../../startOfISOWeek.js";
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+// ISO week of year
+export class ISOWeekParser extends Parser {
+  priority = 100;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "I":
+        return parseNumericPattern(numericPatterns.week, dateString);
+      case "Io":
+        return match.ordinalNumber(dateString, { unit: "week" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 1 && value <= 53;
+  }
+
+  set(date, _flags, value) {
+    return startOfISOWeek(setISOWeek(date, value));
+  }
+
+  incompatibleTokens = [
+    "y",
+    "Y",
+    "u",
+    "q",
+    "Q",
+    "M",
+    "L",
+    "w",
+    "d",
+    "D",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,43 @@
+import { startOfISOWeek } from "../../../startOfISOWeek.js";
+import { constructFrom } from "../../../constructFrom.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigitsSigned } from "../utils.js";
+
+// ISO week-numbering year
+export class ISOWeekYearParser extends Parser {
+  priority = 130;
+
+  parse(dateString, token) {
+    if (token === "R") {
+      return parseNDigitsSigned(4, dateString);
+    }
+
+    return parseNDigitsSigned(token.length, dateString);
+  }
+
+  set(date, _flags, value) {
+    const firstWeekOfYear = constructFrom(date, 0);
+    firstWeekOfYear.setFullYear(value, 0, 4);
+    firstWeekOfYear.setHours(0, 0, 0, 0);
+    return startOfISOWeek(firstWeekOfYear);
+  }
+
+  incompatibleTokens = [
+    "G",
+    "y",
+    "Y",
+    "u",
+    "Q",
+    "q",
+    "M",
+    "L",
+    "w",
+    "d",
+    "D",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,95 @@
+import { setDay } from "../../../setDay.js";
+import { Parser } from "../Parser.js";
+
+import { mapValue, parseNDigits } from "../utils.js";
+
+// Local day of week
+export class LocalDayParser extends Parser {
+  priority = 90;
+  parse(dateString, token, match, options) {
+    const valueCallback = (value) => {
+      // We want here floor instead of trunc, so we get -7 for value 0 instead of 0
+      const wholeWeekDays = Math.floor((value - 1) / 7) * 7;
+      return ((value + options.weekStartsOn + 6) % 7) + wholeWeekDays;
+    };
+
+    switch (token) {
+      // 3
+      case "e":
+      case "ee": // 03
+        return mapValue(parseNDigits(token.length, dateString), valueCallback);
+      // 3rd
+      case "eo":
+        return mapValue(
+          match.ordinalNumber(dateString, {
+            unit: "day",
+          }),
+          valueCallback,
+        );
+      // Tue
+      case "eee":
+        return (
+          match.day(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.day(dateString, { width: "short", context: "formatting" }) ||
+          match.day(dateString, { width: "narrow", context: "formatting" })
+        );
+
+      // T
+      case "eeeee":
+        return match.day(dateString, {
+          width: "narrow",
+          context: "formatting",
+        });
+      // Tu
+      case "eeeeee":
+        return (
+          match.day(dateString, { width: "short", context: "formatting" }) ||
+          match.day(dateString, { width: "narrow", context: "formatting" })
+        );
+
+      // Tuesday
+      case "eeee":
+      default:
+        return (
+          match.day(dateString, { width: "wide", context: "formatting" }) ||
+          match.day(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.day(dateString, { width: "short", context: "formatting" }) ||
+          match.day(dateString, { width: "narrow", context: "formatting" })
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 6;
+  }
+
+  set(date, _flags, value, options) {
+    date = setDay(date, value, options);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "y",
+    "R",
+    "u",
+    "q",
+    "Q",
+    "M",
+    "L",
+    "I",
+    "d",
+    "D",
+    "E",
+    "i",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,46 @@
+import { setWeek } from "../../../setWeek.js";
+import { startOfWeek } from "../../../startOfWeek.js";
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+// Local week of year
+export class LocalWeekParser extends Parser {
+  priority = 100;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "w":
+        return parseNumericPattern(numericPatterns.week, dateString);
+      case "wo":
+        return match.ordinalNumber(dateString, { unit: "week" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 1 && value <= 53;
+  }
+
+  set(date, _flags, value, options) {
+    return startOfWeek(setWeek(date, value, options), options);
+  }
+
+  incompatibleTokens = [
+    "y",
+    "R",
+    "u",
+    "q",
+    "Q",
+    "M",
+    "L",
+    "I",
+    "d",
+    "D",
+    "i",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,76 @@
+import { getWeekYear } from "../../../getWeekYear.js";
+
+import { startOfWeek } from "../../../startOfWeek.js";
+import { Parser } from "../Parser.js";
+
+import { mapValue, normalizeTwoDigitYear, parseNDigits } from "../utils.js";
+
+// Local week-numbering year
+export class LocalWeekYearParser extends Parser {
+  priority = 130;
+
+  parse(dateString, token, match) {
+    const valueCallback = (year) => ({
+      year,
+      isTwoDigitYear: token === "YY",
+    });
+
+    switch (token) {
+      case "Y":
+        return mapValue(parseNDigits(4, dateString), valueCallback);
+      case "Yo":
+        return mapValue(
+          match.ordinalNumber(dateString, {
+            unit: "year",
+          }),
+          valueCallback,
+        );
+      default:
+        return mapValue(parseNDigits(token.length, dateString), valueCallback);
+    }
+  }
+
+  validate(_date, value) {
+    return value.isTwoDigitYear || value.year > 0;
+  }
+
+  set(date, flags, value, options) {
+    const currentYear = getWeekYear(date, options);
+
+    if (value.isTwoDigitYear) {
+      const normalizedTwoDigitYear = normalizeTwoDigitYear(
+        value.year,
+        currentYear,
+      );
+      date.setFullYear(
+        normalizedTwoDigitYear,
+        0,
+        options.firstWeekContainsDate,
+      );
+      date.setHours(0, 0, 0, 0);
+      return startOfWeek(date, options);
+    }
+
+    const year =
+      !("era" in flags) || flags.era === 1 ? value.year : 1 - value.year;
+    date.setFullYear(year, 0, options.firstWeekContainsDate);
+    date.setHours(0, 0, 0, 0);
+    return startOfWeek(date, options);
+  }
+
+  incompatibleTokens = [
+    "y",
+    "R",
+    "u",
+    "Q",
+    "q",
+    "M",
+    "L",
+    "I",
+    "d",
+    "D",
+    "i",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,30 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class MinuteParser extends Parser {
+  priority = 60;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "m":
+        return parseNumericPattern(numericPatterns.minute, dateString);
+      case "mo":
+        return match.ordinalNumber(dateString, { unit: "minute" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 59;
+  }
+
+  set(date, _flags, value) {
+    date.setMinutes(value, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["t", "T"];
+}
@@ -0,0 +1,85 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { mapValue, parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class MonthParser extends Parser {
+  incompatibleTokens = [
+    "Y",
+    "R",
+    "q",
+    "Q",
+    "L",
+    "w",
+    "I",
+    "D",
+    "i",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+
+  priority = 110;
+
+  parse(dateString, token, match) {
+    const valueCallback = (value) => value - 1;
+
+    switch (token) {
+      // 1, 2, ..., 12
+      case "M":
+        return mapValue(
+          parseNumericPattern(numericPatterns.month, dateString),
+          valueCallback,
+        );
+      // 01, 02, ..., 12
+      case "MM":
+        return mapValue(parseNDigits(2, dateString), valueCallback);
+      // 1st, 2nd, ..., 12th
+      case "Mo":
+        return mapValue(
+          match.ordinalNumber(dateString, {
+            unit: "month",
+          }),
+          valueCallback,
+        );
+      // Jan, Feb, ..., Dec
+      case "MMM":
+        return (
+          match.month(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.month(dateString, { width: "narrow", context: "formatting" })
+        );
+
+      // J, F, ..., D
+      case "MMMMM":
+        return match.month(dateString, {
+          width: "narrow",
+          context: "formatting",
+        });
+      // January, February, ..., December
+      case "MMMM":
+      default:
+        return (
+          match.month(dateString, { width: "wide", context: "formatting" }) ||
+          match.month(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.month(dateString, { width: "narrow", context: "formatting" })
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 11;
+  }
+
+  set(date, _flags, value) {
+    date.setMonth(value, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+}
@@ -0,0 +1,82 @@
+import { Parser } from "../Parser.js";
+
+import { parseNDigits } from "../utils.js";
+
+export class QuarterParser extends Parser {
+  priority = 120;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      // 1, 2, 3, 4
+      case "Q":
+      case "QQ": // 01, 02, 03, 04
+        return parseNDigits(token.length, dateString);
+      // 1st, 2nd, 3rd, 4th
+      case "Qo":
+        return match.ordinalNumber(dateString, { unit: "quarter" });
+      // Q1, Q2, Q3, Q4
+      case "QQQ":
+        return (
+          match.quarter(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.quarter(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+
+      // 1, 2, 3, 4 (narrow quarter; could be not numerical)
+      case "QQQQQ":
+        return match.quarter(dateString, {
+          width: "narrow",
+          context: "formatting",
+        });
+      // 1st quarter, 2nd quarter, ...
+      case "QQQQ":
+      default:
+        return (
+          match.quarter(dateString, {
+            width: "wide",
+            context: "formatting",
+          }) ||
+          match.quarter(dateString, {
+            width: "abbreviated",
+            context: "formatting",
+          }) ||
+          match.quarter(dateString, {
+            width: "narrow",
+            context: "formatting",
+          })
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 1 && value <= 4;
+  }
+
+  set(date, _flags, value) {
+    date.setMonth((value - 1) * 3, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "Y",
+    "R",
+    "q",
+    "M",
+    "L",
+    "w",
+    "I",
+    "d",
+    "D",
+    "i",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,30 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class SecondParser extends Parser {
+  priority = 50;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      case "s":
+        return parseNumericPattern(numericPatterns.second, dateString);
+      case "so":
+        return match.ordinalNumber(dateString, { unit: "second" });
+      default:
+        return parseNDigits(token.length, dateString);
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 59;
+  }
+
+  set(date, _flags, value) {
+    date.setSeconds(value, 0);
+    return date;
+  }
+
+  incompatibleTokens = ["t", "T"];
+}
@@ -0,0 +1,96 @@
+import { setDay } from "../../../setDay.js";
+import { Parser } from "../Parser.js";
+
+import { mapValue, parseNDigits } from "../utils.js";
+
+// Stand-alone local day of week
+export class StandAloneLocalDayParser extends Parser {
+  priority = 90;
+
+  parse(dateString, token, match, options) {
+    const valueCallback = (value) => {
+      // We want here floor instead of trunc, so we get -7 for value 0 instead of 0
+      const wholeWeekDays = Math.floor((value - 1) / 7) * 7;
+      return ((value + options.weekStartsOn + 6) % 7) + wholeWeekDays;
+    };
+
+    switch (token) {
+      // 3
+      case "c":
+      case "cc": // 03
+        return mapValue(parseNDigits(token.length, dateString), valueCallback);
+      // 3rd
+      case "co":
+        return mapValue(
+          match.ordinalNumber(dateString, {
+            unit: "day",
+          }),
+          valueCallback,
+        );
+      // Tue
+      case "ccc":
+        return (
+          match.day(dateString, {
+            width: "abbreviated",
+            context: "standalone",
+          }) ||
+          match.day(dateString, { width: "short", context: "standalone" }) ||
+          match.day(dateString, { width: "narrow", context: "standalone" })
+        );
+
+      // T
+      case "ccccc":
+        return match.day(dateString, {
+          width: "narrow",
+          context: "standalone",
+        });
+      // Tu
+      case "cccccc":
+        return (
+          match.day(dateString, { width: "short", context: "standalone" }) ||
+          match.day(dateString, { width: "narrow", context: "standalone" })
+        );
+
+      // Tuesday
+      case "cccc":
+      default:
+        return (
+          match.day(dateString, { width: "wide", context: "standalone" }) ||
+          match.day(dateString, {
+            width: "abbreviated",
+            context: "standalone",
+          }) ||
+          match.day(dateString, { width: "short", context: "standalone" }) ||
+          match.day(dateString, { width: "narrow", context: "standalone" })
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 6;
+  }
+
+  set(date, _flags, value, options) {
+    date = setDay(date, value, options);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "y",
+    "R",
+    "u",
+    "q",
+    "Q",
+    "M",
+    "L",
+    "I",
+    "d",
+    "D",
+    "E",
+    "i",
+    "e",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,85 @@
+import { numericPatterns } from "../constants.js";
+import { Parser } from "../Parser.js";
+
+import { mapValue, parseNDigits, parseNumericPattern } from "../utils.js";
+
+export class StandAloneMonthParser extends Parser {
+  priority = 110;
+
+  parse(dateString, token, match) {
+    const valueCallback = (value) => value - 1;
+
+    switch (token) {
+      // 1, 2, ..., 12
+      case "L":
+        return mapValue(
+          parseNumericPattern(numericPatterns.month, dateString),
+          valueCallback,
+        );
+      // 01, 02, ..., 12
+      case "LL":
+        return mapValue(parseNDigits(2, dateString), valueCallback);
+      // 1st, 2nd, ..., 12th
+      case "Lo":
+        return mapValue(
+          match.ordinalNumber(dateString, {
+            unit: "month",
+          }),
+          valueCallback,
+        );
+      // Jan, Feb, ..., Dec
+      case "LLL":
+        return (
+          match.month(dateString, {
+            width: "abbreviated",
+            context: "standalone",
+          }) ||
+          match.month(dateString, { width: "narrow", context: "standalone" })
+        );
+
+      // J, F, ..., D
+      case "LLLLL":
+        return match.month(dateString, {
+          width: "narrow",
+          context: "standalone",
+        });
+      // January, February, ..., December
+      case "LLLL":
+      default:
+        return (
+          match.month(dateString, { width: "wide", context: "standalone" }) ||
+          match.month(dateString, {
+            width: "abbreviated",
+            context: "standalone",
+          }) ||
+          match.month(dateString, { width: "narrow", context: "standalone" })
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 0 && value <= 11;
+  }
+
+  set(date, _flags, value) {
+    date.setMonth(value, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "Y",
+    "R",
+    "q",
+    "Q",
+    "M",
+    "w",
+    "I",
+    "D",
+    "i",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,82 @@
+import { Parser } from "../Parser.js";
+
+import { parseNDigits } from "../utils.js";
+
+export class StandAloneQuarterParser extends Parser {
+  priority = 120;
+
+  parse(dateString, token, match) {
+    switch (token) {
+      // 1, 2, 3, 4
+      case "q":
+      case "qq": // 01, 02, 03, 04
+        return parseNDigits(token.length, dateString);
+      // 1st, 2nd, 3rd, 4th
+      case "qo":
+        return match.ordinalNumber(dateString, { unit: "quarter" });
+      // Q1, Q2, Q3, Q4
+      case "qqq":
+        return (
+          match.quarter(dateString, {
+            width: "abbreviated",
+            context: "standalone",
+          }) ||
+          match.quarter(dateString, {
+            width: "narrow",
+            context: "standalone",
+          })
+        );
+
+      // 1, 2, 3, 4 (narrow quarter; could be not numerical)
+      case "qqqqq":
+        return match.quarter(dateString, {
+          width: "narrow",
+          context: "standalone",
+        });
+      // 1st quarter, 2nd quarter, ...
+      case "qqqq":
+      default:
+        return (
+          match.quarter(dateString, {
+            width: "wide",
+            context: "standalone",
+          }) ||
+          match.quarter(dateString, {
+            width: "abbreviated",
+            context: "standalone",
+          }) ||
+          match.quarter(dateString, {
+            width: "narrow",
+            context: "standalone",
+          })
+        );
+    }
+  }
+
+  validate(_date, value) {
+    return value >= 1 && value <= 4;
+  }
+
+  set(date, _flags, value) {
+    date.setMonth((value - 1) * 3, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+
+  incompatibleTokens = [
+    "Y",
+    "R",
+    "Q",
+    "M",
+    "L",
+    "w",
+    "I",
+    "d",
+    "D",
+    "i",
+    "e",
+    "c",
+    "t",
+    "T",
+  ];
+}
@@ -0,0 +1,18 @@
+import { constructFrom } from "../../../constructFrom.js";
+import { Parser } from "../Parser.js";
+
+import { parseAnyDigitsSigned } from "../utils.js";
+
+export class TimestampMillisecondsParser extends Parser {
+  priority = 20;
+
+  parse(dateString) {
+    return parseAnyDigitsSigned(dateString);
+  }
+
+  set(date, _flags, value) {
+    return [constructFrom(date, value), { timestampIsSet: true }];
+  }
+
+  incompatibleTokens = "*";
+}
@@ -0,0 +1,18 @@
+import { constructFrom } from "../../../constructFrom.js";
+import { Parser } from "../Parser.js";
+
+import { parseAnyDigitsSigned } from "../utils.js";
+
+export class TimestampSecondsParser extends Parser {
+  priority = 40;
+
+  parse(dateString) {
+    return parseAnyDigitsSigned(dateString);
+  }
+
+  set(date, _flags, value) {
+    return [constructFrom(date, value * 1000), { timestampIsSet: true }];
+  }
+
+  incompatibleTokens = "*";
+}
@@ -0,0 +1,61 @@
+import { Parser } from "../Parser.js";
+
+import { mapValue, normalizeTwoDigitYear, parseNDigits } from "../utils.js";
+
+// From http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_Patterns
+// | Year     |     y | yy |   yyy |  yyyy | yyyyy |
+// |----------|-------|----|-------|-------|-------|
+// | AD 1     |     1 | 01 |   001 |  0001 | 00001 |
+// | AD 12    |    12 | 12 |   012 |  0012 | 00012 |
+// | AD 123   |   123 | 23 |   123 |  0123 | 00123 |
+// | AD 1234  |  1234 | 34 |  1234 |  1234 | 01234 |
+// | AD 12345 | 12345 | 45 | 12345 | 12345 | 12345 |
+export class YearParser extends Parser {
+  priority = 130;
+  incompatibleTokens = ["Y", "R", "u", "w", "I", "i", "e", "c", "t", "T"];
+
+  parse(dateString, token, match) {
+    const valueCallback = (year) => ({
+      year,
+      isTwoDigitYear: token === "yy",
+    });
+
+    switch (token) {
+      case "y":
+        return mapValue(parseNDigits(4, dateString), valueCallback);
+      case "yo":
+        return mapValue(
+          match.ordinalNumber(dateString, {
+            unit: "year",
+          }),
+          valueCallback,
+        );
+      default:
+        return mapValue(parseNDigits(token.length, dateString), valueCallback);
+    }
+  }
+
+  validate(_date, value) {
+    return value.isTwoDigitYear || value.year > 0;
+  }
+
+  set(date, flags, value) {
+    const currentYear = date.getFullYear();
+
+    if (value.isTwoDigitYear) {
+      const normalizedTwoDigitYear = normalizeTwoDigitYear(
+        value.year,
+        currentYear,
+      );
+      date.setFullYear(normalizedTwoDigitYear, 0, 1);
+      date.setHours(0, 0, 0, 0);
+      return date;
+    }
+
+    const year =
+      !("era" in flags) || flags.era === 1 ? value.year : 1 - value.year;
+    date.setFullYear(year, 0, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+}
@@ -0,0 +1,138 @@
+import {
+  millisecondsInHour,
+  millisecondsInMinute,
+  millisecondsInSecond,
+} from "../../constants.js";
+
+import { numericPatterns } from "./constants.js";
+
+export function mapValue(parseFnResult, mapFn) {
+  if (!parseFnResult) {
+    return parseFnResult;
+  }
+
+  return {
+    value: mapFn(parseFnResult.value),
+    rest: parseFnResult.rest,
+  };
+}
+
+export function parseNumericPattern(pattern, dateString) {
+  const matchResult = dateString.match(pattern);
+
+  if (!matchResult) {
+    return null;
+  }
+
+  return {
+    value: parseInt(matchResult[0], 10),
+    rest: dateString.slice(matchResult[0].length),
+  };
+}
+
+export function parseTimezonePattern(pattern, dateString) {
+  const matchResult = dateString.match(pattern);
+
+  if (!matchResult) {
+    return null;
+  }
+
+  // Input is 'Z'
+  if (matchResult[0] === "Z") {
+    return {
+      value: 0,
+      rest: dateString.slice(1),
+    };
+  }
+
+  const sign = matchResult[1] === "+" ? 1 : -1;
+  const hours = matchResult[2] ? parseInt(matchResult[2], 10) : 0;
+  const minutes = matchResult[3] ? parseInt(matchResult[3], 10) : 0;
+  const seconds = matchResult[5] ? parseInt(matchResult[5], 10) : 0;
+
+  return {
+    value:
+      sign *
+      (hours * millisecondsInHour +
+        minutes * millisecondsInMinute +
+        seconds * millisecondsInSecond),
+    rest: dateString.slice(matchResult[0].length),
+  };
+}
+
+export function parseAnyDigitsSigned(dateString) {
+  return parseNumericPattern(numericPatterns.anyDigitsSigned, dateString);
+}
+
+export function parseNDigits(n, dateString) {
+  switch (n) {
+    case 1:
+      return parseNumericPattern(numericPatterns.singleDigit, dateString);
+    case 2:
+      return parseNumericPattern(numericPatterns.twoDigits, dateString);
+    case 3:
+      return parseNumericPattern(numericPatterns.threeDigits, dateString);
+    case 4:
+      return parseNumericPattern(numericPatterns.fourDigits, dateString);
+    default:
+      return parseNumericPattern(new RegExp("^\\d{1," + n + "}"), dateString);
+  }
+}
+
+export function parseNDigitsSigned(n, dateString) {
+  switch (n) {
+    case 1:
+      return parseNumericPattern(numericPatterns.singleDigitSigned, dateString);
+    case 2:
+      return parseNumericPattern(numericPatterns.twoDigitsSigned, dateString);
+    case 3:
+      return parseNumericPattern(numericPatterns.threeDigitsSigned, dateString);
+    case 4:
+      return parseNumericPattern(numericPatterns.fourDigitsSigned, dateString);
+    default:
+      return parseNumericPattern(new RegExp("^-?\\d{1," + n + "}"), dateString);
+  }
+}
+
+export function dayPeriodEnumToHours(dayPeriod) {
+  switch (dayPeriod) {
+    case "morning":
+      return 4;
+    case "evening":
+      return 17;
+    case "pm":
+    case "noon":
+    case "afternoon":
+      return 12;
+    case "am":
+    case "midnight":
+    case "night":
+    default:
+      return 0;
+  }
+}
+
+export function normalizeTwoDigitYear(twoDigitYear, currentYear) {
+  const isCommonEra = currentYear > 0;
+  // Absolute number of the current year:
+  // 1 -> 1 AC
+  // 0 -> 1 BC
+  // -1 -> 2 BC
+  const absCurrentYear = isCommonEra ? currentYear : 1 - currentYear;
+
+  let result;
+  if (absCurrentYear <= 50) {
+    result = twoDigitYear || 100;
+  } else {
+    const rangeEnd = absCurrentYear + 50;
+    const rangeEndCentury = Math.trunc(rangeEnd / 100) * 100;
+    const isPreviousCentury = twoDigitYear >= rangeEnd % 100;
+    result = twoDigitYear + rangeEndCentury - (isPreviousCentury ? 100 : 0);
+  }
+
+  return isCommonEra ? result : 1 - result;
+}
+
+export function isLeapYearIndex(year) {
+  return year % 400 === 0 || (year % 4 === 0 && year % 100 !== 0);
+}