Years with an Era

Provides a consistent vector representation of years with an associated calendar era or time scale. It includes built-in definitions of many contemporary and historic calendars; time scales commonly used in archaeology, astronomy, geology, and other palaeosciences (e.g. Before Present, SI-prefixed 'annus'); and support for arbitrary user-defined eras. Functions for converting between eras and for type-stable arithmetic with years are also provided.


Reference manual

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0.3.1 by Joe Roe, a year ago,

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Browse source code at

Authors: Joe Roe [aut, cre]

Documentation:   PDF Manual  

MIT + file LICENSE license

Imports vctrs, methods, rlang, magrittr, pillar

Suggests tibble, testthat, covr, knitr, rmarkdown, dplyr, spelling, purrr, tidyr

See at CRAN