To cite package ‘datey’ in publications use:

  Gordon T (2026). _datey: Exact Date and Duration Arithmetic on an
  Annual Grid_. R package version 0.1.0,
  <https://CRAN.R-project.org/package=datey>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {datey: Exact Date and Duration Arithmetic on an Annual Grid},
    author = {Tim Gordon},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=datey},
  }