Changes in version 0.1.0 (2026-07-07)                  

Initial CRAN release.

  - datey and durationy represent dates and durations on a discrete
    annual grid, with exact, associative arithmetic (+, -, comparisons,
    mean(), range(), etc.).
  - start_day(), mid_day(), end_day() and datey() map calendar
    year/month/day (and day-fraction), fractional years and Date,
    POSIXct, POSIXlt to datey.
  - to_ymdf() and $year, $month, $day and $day_fraction provide the
    breakdown of a datey into year, month, day and day fraction
    components.
  - is_start_day() and is_mid_day() provides checking of datey
    alignment.
  - as.double() and as.integer() provide convenient conversion to
    numeric types as years, with mixed number and datey/durationy
    arithmetic adhering to the same convention using implicit
    conversion.
  - NA_datey_, NA_durationy_ and NA_datey_interval_ provide type-correct
    NAs, with full is.na()/anyNA() support.
  - Text parsing and formatting for datey, durationy and datey_interval.
  - pillar_shaft() methods for readable printing of datey/durationy/
    datey_interval columns in tibbles.
  - is_leap_year() for integer years and dateys.
  - datey_interval (constructed with datey_interval() or %to%)
    represents a half-open [start, end) date interval. Operations
    include:
      - == and != for equality comparison.
      - %includes% (or interval_includes()) to test whether an interval
        contains a datey or numeric value.
      - & for intersection: returns an empty collapsed interval for
        adjacent intervals, NA_datey_interval_ for non-intersecting
        non-adjacent intervals.
      - is_collapsed(), is_proper() and related predicates.
      - Constants all_of_time and NA_datey_interval_.
  - seq() is supported for datey and durationy via a by argument (note:
    length.out is not supported).