Changes in version 0.5.0.9000                      

  - Added CITATION.cff file with software citation metadata (#49)

                 Changes in version 0.5.0 (2024-11-20)                  

  - New yr_sort() function for chronological ordering of year vectors
    (#44)
  - New yr_earliest(), yr_latest(), and yr_range() functions for
    chronological extremes of year vectors (#43)

                 Changes in version 0.4.1 (2022-11-17)                  

This patch fixes a malfunctioning test that was causing CRAN checks to
fail. There are no significant changes.

  - Fixed malfunctioning check

                 Changes in version 0.4.0 (2022-03-09)                  

  - New eras:
      - Anno Mundi (Hebrew calendar)
  - New year units:
      - Sidereal, tropical, and anomalistic astronomic years #15
      - Hebrew lunisolar years
  - Changes to existing eras:
      - More precise epoch value for Hijri eras: 621.5394 instead of
        622.
      - More precise epoch value for Nowruz (Solar Hijri) eras: 621.2218
        instead of 622.
  - Fixed recurring issues related to the absence of a year 0 in BCE/CE
    #4
  - this_year() now considers the current date, returns a floored
    integer (i.e. the actual current calendar year), and is vectorised
    over era.
  - Added pillar printing methods for era (#33) and era_year (#34) in
    tibbles
  - Class constructors era() and yr() now return a zero-length vector
    when called with no arguments (instead of an error), allowing them
    to be used as prototypes
  - era_yr objects can now be cast to character vectors (e.g.
    as.character(yr(1, "BP")))
  - Combining otherwise equivalent eras with different names or labels
    with c() now triggers a warning (#27), consistent with combining
    them using arithmetic (#3)
  - The era package no longer exports magrittr's pipe operator (%>%)

                 Changes in version 0.3.1 (2021-01-29)                  

CRAN release.

  - Fixed moved link in README

                        Changes in version 0.3.0                        

Second beta / CRAN pre-release.

  - Added new era definitions:
      - Islamic calendars (Lunar Hijri, Solar Hijri).
      - Julian calendar
  - Reworked era definition scheme:
      - Unit is now represented by the era_year class, which describes
        its length in solar days as well as its name. Added functions
        for constructing and working with era_year objects: era_year(),
        is_era_year(), era_year_label(), era_year_days().
      - Direction is now coded as 1 ("forwards") or -1 ("backwards").
        The previous character arguments still work but are deprecated.
      - Equality tests for eras now only check significant parameters
        (i.e. not "label" or "name"), allowing for coercion between
        functionally equivalent eras, e.g. yr(1, "BP") + yr(1, "cal BP")
        now works (with a warning) (#3).
  - Improved yr_transform():
      - Can now convert between eras with different year units (#25).
      - Now has a precision argument, allowing the result to be rounded
        (#23).
  - era and yr objects are now validated when constructed, using new
    functions validate_era()/is_valid_era() and
    validate_yr()/is_valid_yr() (#7 and #8).
  - Minor changes/bug fixes:
      - Added this_year(), which returns the current year as a yr
        object.
      - era(NA) now returns an error, not a vector of all standard eras
        (#20).
      - All era arguments in functions can now accept a character vector
        (#20)
      - era(<era>) now returns an era with the same parameters (to
        enable the above)
      - Various additions to make the coercion hierarchy for era_yrs
        more consistent; most notably, the common prototype of era_yr,
        integer, and double, is now era_yr.
      - Fixed printing of NA eras (#9)
      - Errors now use the rlang format and are in general more
        informative (#26 and #28)

                        Changes in version 0.2.0                        

First beta release, including:

  - S3 vector class yr (era_yr) representing years with an era
      - yr() constructor
      - Functions for getting and setting the era of a yr object:
        yr_era(), yr_era()<- and yr_set_era()
      - Format and print methods for yrs
      - Vector arithmetic methods for yrs
  - S3 record class era representing an era definition
      - era() constructor
      - Format and print methods for eras
      - Getter functions for era parameters: era_label(), era_name(),
        era_epoch(), era_unit(), era_scale(), era_direction()
      - eras() defining standard eras
  - yr_transform() function for converting years between eras
  - Function documentation and introductory vignette: vignette("era")
  - A NEWS.md file to track changes to the package.

                        Changes in version 0.1.0                        

Initial development version.