Lubridate 1.9.2

BUG FIXES

• #1104 Fix incorrect parsing of months when %a format is present.

OTHER

• Adapt to internal name changes in R-devel

Lubridate 1.9.1

NEW FEATURES

• as_datetime() accepts multiple formats in format argument, just like as_date() does.

BUG FIXES

• #1091 Fix formatting of numeric inputs to parse_date_time.
• #1092 Fix regression in ymd_hm on locales where p format is not defined.
• #1097 Fix as_date("character") to work correctly with formats that include extra characters.
• #1098 Roll over the month boundary in make_dateime() when units exceed their maximal values.
• #1090 timechange has been moved from Depends to Imports.

Lubridate 1.9.0

Version 1.9.0

NEW FEATURES

• roll argument to updating and time-zone manipulation functions is deprecated in favor of a new roll_dst parameter.
• #1042 as_date with character inputs accepts multiple formats in format argument. When format is supplied, the input string is parsed with parse_date_time instead of the old strptime.
• #1055 Implement as.integer method for Duration, Period and Interval classes.
• #1061 Make year<-, month<- etc. accessors truly generic. In order to make them work with arbitrary class XYZ, it's enough to define a reclass_date.XYZ method.
• #1061 Add support for year<-, month<- etc. accessors for data.table's IDate and ITime objects.
• #1017 week_start argument in all lubridate functions now accepts full and abbreviated names of the days of the week.
• The assignment value wday<- can be a string either in English or as provided by the current locale.
• Date rounding functions accept a date-time unit argument for rounding to a vector of date-times.
• #1005 as.duration now allows for full roundtrip duration -> as.character -> as.duration
• #911 C parsers treat multiple spaces as one (just like strptime does)
• stamp gained new argument exact=FALSE to indicate whether orders argument is an exact strptime formats string or not.
• #1001 Add %within method with signature (Interval, list), which was documented but not implemented.
• #941 format_ISO8601() gained a new option usetz="Z" to format time zones with a "Z" and convert the time to the UTC time zone.
• #931 Usage of Period objects in rounding functions is explicitly documented.

BUG FIXES

• #1036 %within% now correctly works with flipped intervals
• #1085 as_datetime() now preserves the time zone of the POSIXt input.
• #1072 Names are now handled correctly when combining multiple Period or Interval objects.
• #1003 Correctly handle r and R formats in locales which have no p format
• #1074 Fix concatination of named Period, Interval and Duration vectors.
• #1044 POSIXlt results returned by fast_strptime() and parse_date_time2() now have a recycled isdst field.
• #1069 Internal code handling the addition of period months and years no longer generates partially recycled POSIXlt objects.
• Fix rounding of POSIXlt objects
• #1007 Internal lubridate formats are no longer propagated to stamp formater.
• train argument in parse_date_time now takes effect. It was previously ignored.
• #1004 Fix c.POSIXct and c.Date on empty single POSIXct and Date vectors.
• #1013 Fix c(POSIXct,POSIXlt) heterogeneous concatenation.
• #1002 Parsing only with format j now works on numeric inputs.
• stamp() now correctly errors when no formats could be guessed.
• Updating a date with timezone (e.g. tzs = "UTC") now returns a POSIXct.

INTERNALS

• lubridate is now relying on timechange package for update and time-zone computation. Google's CCTZ code is no longer part of the package.
• lubridate's updating logic is now built on top of timechange package.
• Change implementation of c.Period, c.Duration and c.Interval from S4 to S3.

Lubridate 1.7.10

Version 1.7.10

NEW FEATURES

• fast_strptime() and parse_date_time2() now accept multiple formats and apply them in turn

BUG FIXES

• #926 Fix incorrect division of intervals by months involving leap years
• Fix incorrect skipping of digits during parsing of the %z format

Lubridate 1.7.9

Version 1.7.9

NEW FEATURES

• ##871 Add vctrs support

BUG FIXES

• #890 Correctly compute year in quarter(..., with_year = TRUE)
• #893 Fix incorrect parsing of abbreviated months in locales with trailing dot (regression in v1.7.8)
• #886 Fix with_tz() for POSIXlt objects
• #887 Error on invalid numeric input to month()
• #889 Export new dmonth function

Lubridate 1.7.8

NEW FEATURES

• (breaking) Year and month durations now assume 365.25 days in a year consistently in conversion and constructors. Particularly dyears(1) == years(1) is now TRUE.
• Format and print methods for 0-length objects are more consistent.
• New duration constructor dmonths() to complement other duration constructors.
• duration() constructor now accepts months and years arguments.
• #629 Added format_ISO8601() methods.
• #672 Eliminate all partial argument matches
• #674 as_date() now ignores the tz argument
• #675 force_tz(), with_tz(), tz<- convert dates to date-times
• #681 New constants NA_Date_ and NA_POSIXct_ which parallel built-in primitive constants.
• #681 New constructors Date() and POSIXct() which parallel built-in primitive constructors.
• #695 Durations can now be compared with numeric vectors.
• #707 Constructors return 0-length inputs when called with no arguments
• #713 (breaking) as_datetime() always returns a POSIXct()
• #717 Common generics are now defined in generics dependency package.
• #719 Negative Durations are now displayed with leading -.
• #829 %within% throws more meaningful messages when applied on unsupported classes
• #831 Changing hour, minute or second of Date object now yields POSIXct.
• #869 Propagate NAs to all internal components of a Period object

BUG FIXES

• #682 Fix quarter extraction with small fiscal_starts.
• #703 leap_year() works with objects supported by year().
• #778 duration()/period()/make_difftime() work with repeated units
• c.Period concatenation doesn't fail with empty components.
• Honor exact = TRUE argument in parse_date_time2, which was so far ignored.

Lubridate 1.7.4

NEW FEATURES

• #658 %within% now accepts a list of intervals, in which case an instant is checked if it occurs within any of the supplied intervals.

CHANGES

• #661 Throw an error on invalid multi-unit rounding.
• #633 %% on intervals relies on %m+ arithmetic and doesn't produce NAs when intermediate computations result in non-existent dates.
• tz() always returns "UTC" when tzone attribute cannot be inferred.

BUG FIXES

• #664 Fix lookup of period functions in as.period
• #649 Fix system timezone memoization

Lubridate 1.7.3

BUG FIXES

• #643, #640, #645 Fix faulty caching of system timezone.

Lubridate 1.7.2

NEW FEATURES

• Durations, Periods and difftimes are now comparable with each other.
• interval constructor accepts start and end character vectors in ISO 8601 format
• #362 Add support for ISO 8601 formats in interval constructor
• #622 Add support for ISO 8601 formats in periods and durations constructor

CHANGES

• Correct license to the originally intended GPL (>= 2)

BUG FIXES

• #605 Fix wrong ceiling of days during DST transition.
• #607 Re-instate format argument to as_date and as_datetime (regression in v1.7.1)
• Fix intersection of intervals with missing values.
• Fix UBSAN errors in update.cpp

Lubridate 1.7.1

This is a bug fixing release.

BUG FIXES

• #575, #600, #602 Fix zoneinfo lookup on windows and solaris.
• #598 Fix broken parsing of ymd_hms strings by as_date.
• #597 Fix broken parsing of ymd strings by as_datetime.