calcal: Calendrical Calculations

An R implementation of the algorithms described in Reingold and Dershowitz (4th ed., Cambridge University Press, 2018) <doi:10.1017/9781107415058>, allowing conversion between many different calendar systems. Cultural and religious holidays from several calendars can be calculated.

Version: 1.0.0
Depends: R (≥ 4.1.0)
Imports: vctrs
Suggests: knitr, rmarkdown, testthat (≥ 3.0.0), tibble
Published: 2025-07-22
DOI: 10.32614/CRAN.package.calcal
Author: Rob Hyndman ORCID iD [aut, cre, cph], Edward Reingold [cph, ctb] (Original Lisp code), Nachum Dershowitz [cph, ctb] (Original Lisp code)
Maintainer: Rob Hyndman <Rob.Hyndman at monash.edu>
BugReports: https://github.com/robjhyndman/calcal/issues
License: Apache License (≥ 2)
URL: https://pkg.robjhyndman.com/calcal/, https://github.com/robjhyndman/calcal
NeedsCompilation: no
Materials: README, NEWS
CRAN checks: calcal results

Documentation:

Reference manual: calcal.html , calcal.pdf
Vignettes: Creating a new calendar (source, R code)

Downloads:

Package source: calcal_1.0.0.tar.gz
Windows binaries: r-devel: calcal_1.0.0.zip, r-release: calcal_1.0.0.zip, r-oldrel: calcal_1.0.0.zip
macOS binaries: r-release (arm64): calcal_1.0.0.tgz, r-oldrel (arm64): calcal_1.0.0.tgz, r-release (x86_64): calcal_1.0.0.tgz, r-oldrel (x86_64): calcal_1.0.0.tgz

Linking:

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