time-compat

Compatibility package for time

https://github.com/haskellari/time-compat

LTS Haskell 24.31:	1.9.9
Stackage Nightly 2026-02-14:	1.9.9
Latest on Hackage:	1.9.9

See all snapshots time-compat appears in

BSD-3-Clause licensed by Ashley Yakeley

Maintained by Oleg Grenrus

This version can be pinned in stack with:time-compat-1.9.9@sha256:4f9f5f2a6193387ce91459191b54bf6319aad58c30a6edb3c4abae471ec29a2c,5268

Module documentation for 1.9.9

Data
- Data.Time
  - Data.Time.Calendar
    - Data.Time.Calendar.Compat
    - Data.Time.Calendar.Easter
      - Data.Time.Calendar.Easter.Compat
    - Data.Time.Calendar.Julian
      - Data.Time.Calendar.Julian.Compat
    - Data.Time.Calendar.Month
      - Data.Time.Calendar.Month.Compat
    - Data.Time.Calendar.MonthDay
      - Data.Time.Calendar.MonthDay.Compat
    - Data.Time.Calendar.OrdinalDate
      - Data.Time.Calendar.OrdinalDate.Compat
    - Data.Time.Calendar.Quarter
      - Data.Time.Calendar.Quarter.Compat
    - Data.Time.Calendar.WeekDate
      - Data.Time.Calendar.WeekDate.Compat
  - Data.Time.Clock
    - Data.Time.Clock.Compat
    - Data.Time.Clock.POSIX
      - Data.Time.Clock.POSIX.Compat
    - Data.Time.Clock.System
      - Data.Time.Clock.System.Compat
    - Data.Time.Clock.TAI
      - Data.Time.Clock.TAI.Compat
  - Data.Time.Compat
  - Data.Time.Format
    - Data.Time.Format.Compat
    - Data.Time.Format.ISO8601
      - Data.Time.Format.ISO8601.Compat
  - Data.Time.LocalTime
    - Data.Time.LocalTime.Compat

Depends on 6 packages(full list with versions):

base, base-orphans, deepseq, hashable, template-haskell, time

Used by 14 packages in nightly-2026-02-14(full list with versions):

advent-of-code-api, aeson, aeson-combinators, attoparsec-iso8601, binary-instances, hsemail, http-api-data, opaleye, postgresql-simple, quickcheck-instances, rebase, text-iso8601, tztime, uri-templater

This packages tries to compat as much of time features as possible.

TODO:

Difference type ParseTime and FormatTime instances are missing.
Formatting varies depending on underlying time version
dayFractionToTimeOfDay on extreme values

Changes

1.9.9

Support time-1.15
- add patterns for DiffTime & NominalDiffTime
- add more Lift instances
- fix MonthDay and QuarterDay clipping

1.9.8

1.9.7

Drop support for GHCs prior 8.6.5

1.9.6.1

Support time-1.12.

1.9.6

Move Hashable instance here from hashable-time package. Note: ZonedTime instance is dropped, as ZonedTime doesn’t have Eq instance.
Drop GHC-7.0 and GHC-7.2 support.

1.9.5

Support time-1.11.1
- Add NFData CalandarDiffDays instance

1.9.4

Support time-1.11
- Data.Time.Calendar.Month
- Data.Time.Calendar.Quarter
- Pattern synonyms
- parseTimeMultipleM is not backported
- Month is missing ParseTime instance
- Compat extras:
  - Add Ix, Enum, NFData instances to Month, Quarter, QuarterOfYear, CalendarDiffTime and DayOfWeek.

1.9.3

Include pastMidnight and sinceMidnight aliases (backported from time-1.10)
Support time-1.10