v3.7.2

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• Fix ES6 packaging

v3.7.1

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• Revert change in ES6 packaging

v3.7.0

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• Added showZeros option to Duration#toHuman
• Added Duration#removeZeros method.
• Added rounding option to DateTime#toRelative
• Added precision option to ISO formatting methods
• Added signMode option to Duration#toFormat
• Allow escaping single quotes in format strings
• Improve output of Info.months and Info.monthsFormat for ja locale
• Accept lowercase t as a separator in ISO strings
• Accept lowercase z as an offset in ISO strings
• Reject non-finite numbers where previously only NaN was rejected
• Improve the documentation for Interval
• Added a dark theme for the documentation site

v3.6.1

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• Add Fallback for minimalDays being removed from Intl.WeekInfo
• Fix various caches when JS keywords like "constructor" are used for names

v3.6.0

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• Add Interval.lastDateTime
• Fix a bug that could cause wrong timezone calculations when multiple timezones are in use

v3.5.0

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• Various performance improvements
• throwOnInvalid causes the constructor to throw if the year is invalid

v3.4.4

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• Localized week support (#​1454)
• Added custom inspect for Node (#​1526)
• Fix sorting in Interval.splitAt (#​1524)

v3.4.3

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• Fixes another regression from 3.4.0 (#​1496)

v3.4.2

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• Fixes regression from 3.4.1 (#​1493)

v3.4.1

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• Fixes for regressions from 3.4.0 (#​1482 and #​1488)

v3.4.0

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• Fix type checking on input zones
• Fix Islamic months listing
• Fix normalize() for negative inputs

v3.3.0

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• Fix off-by-one in Interval#count (#​1308)
• Support formatting for custom zones (#​1377)
• Fix parsing for narrow spaces (#​1369)
• Handle leap year issue with AD 100 (#​1390)
• Allow parsing of just an offset

v3.2.1

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• Fix for RFC-2822 regex vulnerability
• Better handling of BCP tags with -x- extensions

v3.2.0

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• Allow timeZone to be specified as an intl option
• Fix for diff's handling of end-of-month when crossing leap years (#​1340)
• Add Interval.toLocaleString() (#​1320)

v3.1.1

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• Add Settings.twoDigitCutoffYear

v3.1.0

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• Add Duration.rescale

v3.0.4

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• Fix quarters in diffs (#​1279)
• Export package.json in package (#​1239)

v3.0.3

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v3.0.2

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• Lots of doc changes
• Added DateTime.expandFormat
• Added support for custom conversion matrices in Durations

v3.0.1

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• Add DateTime.parseFormatForOpts

v3.0.0

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• Add "default" as an option for specifying a zone, and change "system" to really mean the system zone (breaking change)

v2.5.2

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v2.5.1

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v2.5.0

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• Support for ESM-style node imports
• Fix Wednesday parsing for RFC 850 strings
• Increase number of digits allowed in ISO durations

2.4.0 (2022-05-08)

• Add support for parsing the ISO zone extension, like 2022-05-08T20:42:00.000-04:00[America/New_York]
• Add an extendedZone option to toISO() and toISOTime
• Improvements to DateTime.isInDST()
• Fix for parsing in Vietnames (and probably other languages)

2.3.2 (2022-04-17)

• Fix timezone calculations for negative years
• add week formatting token "w" for durations
• fix weekday computation for years 0-100

2.3.1 (2022-02-23)

• Added an includeOffsetSpace option to toSQL and toSQLTime
• Added toUnixInteger
• Don't use -0 when negating durations with zeros in them

2.3.0 (2022-01-02)

• Major perf improvements to toISO(), toISODate(), toISOTime(), and toSQLDate()
• Fixed date padding for negative years in toISO()
• Added Duration#toHuman()

2.2.0 (2021-12-10)

• Allow offsets to pick among ambiguous times when both an offset and zone are provided to fromFormat
• Fix a floating point bug in Duration.shiftTo()

2.1.1 (2021-11-08)

• Fix issue in quirky environments that lack hourCycle support and sometimes computed offsets 12 hours off

2.1.0 (2021-11-07)

• Stop special casing of Etc/GMT* zones
• export fromDurationLike
• memoize zone validation
• Support for fractional elements in duration ISO parsing
• Added uu and uuu tokens for fractional millisecond parsing

2.0.2 (2021-08-08)

Fix locale defaulting

2.0.0 (2021-07-3)

See Upgrading section

1.28.0 (2021-07-03)

• Fix ISO parsing for offset specifiers in Year-Ordinal formats

1.27.0 (2021-05-08)

• Fix GMT zone parsing for older versions of Node
• Support multiple units in toRelative
• Various documentation updates

1.26.0 (2021-02-13)

• Add fromISOTime, toISOTime and toMillis to Duration (#​803)
• Fix padding of negative years in IsoDate (#​871)
• Fix hasSame unit comparison (#​798)
• Export VERSION information (#​794)
• Durations are considered equal with extra zero units. Fixes #​809 (#​811)

1.25.0 (2020-08-23)

• fix fromFormat with Intl formats containing non-breaking spaces
• Support higher precision in ISO milliseconds
• Some fixes for 00:30 timezones
• Fix some throwOnInvalid for invalid Intervals
• Various doc fixes
• Fix Interval#isSame for empty intervals
• Mark package as side effect-free
• Add support for intervals with a large number of seconds

1.24.1 (2020-05-04)

• Remove erroneous console.log call

1.24.0 (2020-05-03)

• Update polyfills for pollyfilled build

1.23.0 (2020-04-02)

• Allow minus sign prefix when creating Duration from ISO

1.22.2 (2020-03-25)

• Added more details to error messages for type errors

1.22.1 (2020-03-19)

• Added support for ISO basic format to DateTime#toISO

1.22.0 (2020-01-26)

• Fix setZone's handling of pre-1970 dates with millisecond components
• Fix keepLocalTime for large jumps near the target zone's DST
• Fix cache perf for toRelative()

1.21.3 (2019-11-28)

• Fix parsing of meridiems in macro tokens in newer versions of v8

1.21.2 (2019-11-18)

• Fix bug in Chrome Canary that threw off time zone calculations

1.21.1 (2019-11-03)

• Fix for quarter parsing
• Some documentation updates

1.21.0 (2019-10-30)

• Added quarter support to the parser
• Fix some rounding issues in ISO formatting

1.20.0 (2019-10-29)

• Added Duration#mapUnits
• added Interval#toISODate and Interval#toISOTime
• Some documentation fixes

1.19.3

• Cache offset values
• Fix handling of negative sub 1-hour offsets

1.19.2

• Speculative fix for Node 6

1.19.1

• Fix Intl.DateTimeFormat usage for polyfills

1.19.0

• Interval#splitAt now ignores input dates outside the interval
• Don't allow decimals in DateTime creation

1.18.2

• Fix handling of decimals in DateTime#plus and #minus

1.18.1

• Fix validity when adding or subtracting time that exceeds Date max/min boundaries

1.18.0

• Add support for macro tokens in the parser

1.17.2

• Fix issue with toRelative using style: short with plural days

1.17.1

• Reject out-of-range numbers in DateTime.fromMillis
• Reject 0s in ISO date inputs

1.17.0

• DateTime.min and DateTime.max throw if they get the wrong kind of arguments
• Fixed throwOnInvalid logic for Interval
• Added DATETIME_MED_WITH_WEEKDAY preset

1.16.1

• Catch errors trying to use Intl in weird versions of IE 11

1.16.0

• Fixed locale default logic for `DateTime#toFormat("ZZZZ")

1.15.0

• Added formatOffset to Zones

1.14.0

• Allow the zone argument to Interval.fromISO with duration components
• Ignore the zone argument to Duration factory methods

1.13.3

• Fix keepLocalTime calculations that span offset changes

1.13.2

• Fixed ISO formatting for dates > 999

1.13.1

• Performance improvements for regex parsing

1.13.0

• Support numberSystem in fromFormat
• Fix validity for bad initial zone specifiers

1.12.1

• Fix cross-month diffs in some scenarios
• Fix time zone parsing when the time zone isn't at the end
• Memoize IANA zone creation

1.12.0

• Add some explicit CDN support to the NPM package
• Add week token to duration ISO support
• Lots of cleanup and test coverage changes

1.11.4

• setZone("local") now returns the defaultZone if it is set
• Fixes for the polyfilled build

1.11.3

• Allow 24:00 in ISO (and other) strings
• Fix some bugs with the typecheck functions like DateTime.isDateTime()

1.11.2

• Fixed handling of some characters in fromFormat literal sections
• Handle string values in object arguments to DateTime methods
• Fixed toRelativeCalendar's handling of zones in the base date

1.11.1

• Fix DateTime#plus() when spanning across AD 100

1.11.0

• Fix low-year handling for IANA zones
• DateTime#toLocal() now uses the default locale
• Fix zero duration formatting
• Many documentation fixes

1.10.0

• Fix endOf("day") during DSTs (#​399)
• Add `Interval#mapEndpoints (#​400)
• Add DateTime#zone and Info.normalizeZone (#​404)

1.9.0

• Add DateTime#toRelative and DateTime#toRelativeCalendar

1.8.3

• Allow "UTC" in the zone position of fromSQL
• Force isDateTime and isDuration to return booleans in all cases

1.8.2

• Trim leading \u200e characters from offset names in Edge 16 and 17

1.8.1

• Add DateTime.fromSeconds and DateTime#toSeconds

1.7.1

• Floor the seconds instead of rounding them when outputting the 'X' format
• Change the options to toLocale to override the configuration (the previous options were essentially ignored)

1.6.2

• Fixing merge error that resulted in bad error messages

1.6.0

• midly breaking Rework negative durations
• Fix handling

v2.4.0

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• Add support for parsing the ISO zone extension, like 2022-05-08T20:42:00.000-04:00[America/New_York]
• Add an extendedZone option to toISO() and toISOTime
• Improvements to DateTime.isInDST()
• Fix for parsing in Vietnames (and probably other languages)

v2.3.2

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• Fix timezone calculations for negative years
• add week formatting token "w" for durations
• fix weekday computation for years 0-100

v2.3.1

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• Added an includeOffsetSpace option to toSQL and toSQLTime
• Added toUnixInteger
• Don't use -0 when negating durations with zeros in them

v2.3.0

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• Major perf improvements to toISO(), toISODate(), toISOTime(), and toSQLDate()
• Fixed date padding for negative years in toISO()
• Added Duration#toHuman()

v2.2.0

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• Allow offsets to pick among ambiguous times when both an offset and zone are provided to fromFormat
• Fix a floating point bug in Duration.shiftTo()

v2.1.1

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• Fix issue in quirky environments that lack hourCycle support and sometimes computed offsets 12 hours off

v2.1.0

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• Stop special casing of Etc/GMT* zones
• export fromDurationLike
• memoize zone validation
• Support for fractional elements in duration ISO parsing
• Added uu and uuu tokens for fractional millisecond parsing

v2.0.2

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Fix locale defaulting

v2.0.1

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v2.0.0

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See Upgrading section