To cite package ‘dateutils’ in publications use:

Leonard S (2021). dateutils: Date Utils. R package version 0.1.5, https://CRAN.R-project.org/package=dateutils.

Corresponding BibTeX entry:

  @Manual{,
    title = {dateutils: Date Utils},
    author = {Seth Leonard},
    year = {2021},
    note = {R package version 0.1.5},
    url = {https://CRAN.R-project.org/package=dateutils},
  }