Fast Utilities for Year Month Day Objects R package fastymd version 0.1.5 A collection of utility functions for working with Year Month Day objects. Includes functions for fast parsing of numeric and character input based on algorithms described in Hinnant, H. (2021) <https://howardhinnant.github.io/date_algorithms.html> as well as a branchless calculation of leap years by Jerichaux (2025) <https://stackoverflow.com/a/79564914>. Software Depends: R (>= 4.2.0) Suggests: fasttime, lubridate, microbenchmark, tinytest, ymd, litedown Tim Taylor <tim.taylor@hiddenelephants.co.uk> Comprehensive R Archive Network (CRAN) Tim Taylor [aut, cre] (ORCID: <https://orcid.org/0000-0002-8587-7113>), Howard Hinnant [aut] (Author of underlying algorithms for calculating Epoch days to Calendar days and vice versa), jerichaux [aut] (Author of included branchless leap year calculation) GPL-3 2026-02-27 application/tgz https://CRAN.R-project.org/package=fastymd doi:10.32614/CRAN.package.fastymd