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lubridate

ANALYTICS
Velocity0.0

Makes working with dates and date-times in R straightforward and consistent

github.com/tidyverse/lubridate ↗

lubridate ships parsing fixes, timezone-data churn, and a long-overdue MIT relicense.

rdate-timeparsingtimezonesmaintenance
◆Current state
lubridate is R's standard package for date-time manipulation. Recent releases are dominated by parsing correctness — partial datetimes, multiple format strings, month names colliding with the %a format — and by adapting to timezone database changes in R-devel. Version 1.9.5 also relicensed the package to MIT.
◆Where it's heading
The feature surface has been stable since 1.9.0 deprecated the roll argument for roll_dst and added integer coercion for Duration, Period and Interval. What continues is a steady stream of parsing edge cases and tzdata churn the package absorbs on its users' behalf, which is most of what a date-time library's maintenance actually is.
◆Prediction
Expect further releases driven by tzdata and R-devel changes, with parsing fixes arriving as locale and format edge cases get reported.

◆Recent moves

  1. 6mo ago

    lubridate 1.9.5 relicenses to MIT and fixes timestamp order

    lubridate moves to an MIT licence, alongside a timestamp ordering fix. The relicense carries no technical weight but removes a licensing consideration for anyone embedding the package in commercial or differently-licensed work.

    View source ↗
  2. 6mo ago

    lubridate 1.9.4 parses partial datetimes like as.POSIXct()

    Drops CET and EST as example timezones to accommodate R-devel's tzdata upgrade, and makes as_datetime() parse partial datetimes the way as.POSIXct() already did. The second closes a genuine inconsistency between two functions users treat as interchangeable.

    View source ↗
  3. 3y ago

    lubridate 1.9.2 fixes month parsing when %a is present

    Fixes incorrect month parsing when the %a format is present, plus adaptation to internal name changes in R-devel. A narrow parsing bug and routine upstream tracking.

    View source ↗
  4. 3y ago

    lubridate 1.9.1 accepts multiple formats in as_datetime()

    as_datetime() accepts multiple formats like as_date() does, and a cluster of parsing regressions is repaired — numeric inputs to parse_date_time, ymd_hm in locales without a defined p format, as_date() with extra characters in the format. Consistency work across the parsing family.

    View source ↗
  5. 3y ago

    lubridate 1.9.0 replaces roll with an explicit roll_dst argument

    The last release to change the API meaningfully: roll is deprecated in favour of roll_dst, making daylight-saving intent explicit, as_date() takes multiple character formats parsed via parse_date_time, and as.integer() methods arrive for Duration, Period and Interval.

    View source ↗
  6. 5y ago

    lubridate 1.7.10 fixes interval division across leap years

    fast_strptime() and parse_date_time2() accept multiple formats and try them in turn, and interval division by months is fixed for cases involving leap years. The leap-year fix is the sort of silent arithmetic error that corrupts results without raising anything.

    View source ↗