To cite package ‘christmas’ in publications use:

Barrera-Gomez J (2025). christmas: Generation of Different Animated Christmas Cards. R package version 1.4.1, https://CRAN.R-project.org/package=christmas.

Corresponding BibTeX entry:

  @Manual{,
    title = {christmas: Generation of Different Animated Christmas
      Cards},
    author = {Jose Barrera-Gomez},
    year = {2025},
    note = {R package version 1.4.1},
    url = {https://CRAN.R-project.org/package=christmas},
  }