Make working with dates in R just that little bit easier
force_tzs for "enforcement" of heterogeneous time zones.local_time for the retrieval of local day time in different time zones.cutoff_2000 for parsing functions to indicate 20th century cutoff for y format.week_start parameter in wday and wday<- to set week start.locale in wday. Labels of the returned factors (when label=TRUE) now respect current locale.locale in month. Labels of the returned factors (when label=TRUE) now respect current locale.quarter gained a new argument fiscal_start to address the issue of different fiscal conventions.epiweek and epiyear.week_start to floor_date, ceiling_date and round_date.season is now supported.as_date and as_datetime now understand character vectors.parse_date_time - train=TRUE and drop=FALSE which allow more refined control of the format guessing. Formats are no longer dropped in the process by default, process which resulted in surprising behavior on several occasions (#516,#308,#307).wday and month are now in current locale. The abbreviated labels in English locales have been changed to standard abbreviations (Tues -> Tue, Thurs -> Thu etc.).with_tz on invalid timezone.B and b formats no longer match numeric months. This corresponds to the original intent, and was always documented as such.days, dhours, round_date work when the methods package is not loaded.wday work on character inputs as it is the case with all other day accessors.y format when it's the last in format order (as in mdy).m and b formats now works correctly.date() when called with missing argument.NA properly.make_datetime respects tz argument and is much faster now.day<-, minute<-, etc. from producing an error when length(x) is 0 (issue #517)parse_date_time now throw warnings only for actual parsing errors (input with all NAs are silent)semester to extract semesters form date-time objects.period and duration constructors now accept string as first argument. Same parsing rules apply to the 'unit' parameter in rounding functions.hms, hm, ms gained new argument roll=TRUE which rolls minutes and seconds bigger than 59 towards higher units.round_date, floor_date and ceiling_date now support rounding to multiple of units.yq for parsing most common version of quarter strings.q for parsing quarters in all lubridate parsing functions.as_datetime to coerce to POSIXct object. A counterpart of as_date.make_date to produce Date objects. A counterpart of make_datetime.ceiling_date for Date objects was changed to what most of the users expect. Rounding up by months now produces first day of the next months even for first day of the month.round_date, ceiling_date, and floor_date now accept "quarter", "bimonth", and "halfyear" as unit options.parse_date_time and related functions are now deprecated.pretty.* family of functions were renamed and are no longer exported. If you need to use them, use lubridate:::pretty_* versions.change_on_boundary argument in ceiling_date does not allow for global option anymore.as.duration, as.numeric don't show "only estimate" messages on conversion from periods. The occasional approximate conversion is documented and deemed common knowledge.as.numeric with unit="month" now works on duration objects.Date objects now return POSIXct instead of POSIXlt.mdy or myd beginning with "January" or "Jan" now parsing correctlyhere and olson_time_zones were deprecated in favor of new and base OlsonNames respectively.period and duration constructors.date_decimal and decimal_date.as.numeric correctly converts periods to (approximate) numeric time lengths.ceiling_date gains new argument change_on_boundary to allow ceiling on boundary of date-time objects.parse_date_time2 and fast_strptime gain new lt argument to control type of output.date and date<- additions to the year, month etc family of accessors.make_datetime (dropin replacement of ISOdatetime).force_tz and with_tz can handle data.frames component-wise.as_date replacement of as.Date with more intuitive behavior with non-UTC timezones.hms parsers now handle negative components.ymd family of functions return Date object when tz argument is NULL (new default) and POSIXct otherwise.base:strptime fast_strptime now returns POSIXlt object. That is, its lt argument defaults to TRUE.interval constructor treats timezones correctly and works with UTC whenever meaningful.as.period correctly computes months with intervals spanning multiple years.time_length and add_with_rollback now work correctly with missing intervals.fast_strptime and parse_date_time2 correctly treat non-UTC time zones.floor_date and round_date are not preserving tz component for larger than day unitsThis is a extensive bug fix release with no major known bugs left. The lubridate package should be now faster, more stable and more user friendly.
There are two notable changes to the UI. First, new_zzz style constructors, such as new_interval, new_period etc., were absorbed by interval, period etc. constructors without affecting the flexibility or backward compatibility. Second, new argument exact to parse_date_time allows direct specification of the formats and thus avoids guessing and training of the formats behind the scene.
time_length method.isoyear function to line up with isoweek.exact = TRUE
option to parse_date_time for faster and much more flexible specification of
formats.simple argument to fit_to_timeline and update methods mostly
intended for internal use.unique method for interval classpreserve_hms and roll_to_first in rollback function.quarter option in floor_date and friends.as.list.Interval S3 method.qday (quarter day).new_interval, new_period,
new_duration, new_difftime were deprecated in favour of the more powerful
interval, period, duration and make_difftime functions.eseconds, eminutes etc. were deprecated in favour of dsecons, dminutes etc.test/testthat.isodate was replaced with a much faster parse_date_time2(paste(...)) alternativeLubridate's trunc,
ceiling and floor functions have been optimised and now are relying on R's
trunc.POSIXct whenever possible.fst objects.enc2utf8.int_standardize
ceiling_date skip day light gap.preproc_wday=T.parse_date_time.fit_to_timeline function.isoweek computationseconds_to_period.$<- assignment for periods are now properly recycled.round_date.time-zones.R in coercion.R.standardise_lt_names.as.period.period if unit != NULL.as.period.interval without recurring to modulo arithmetic.hms, hm and ms for new printing style.guess_formats now matches flex regexp first.dmilliseconds now correctly returns a Duration object.