To cite package ‘era’ in publications use:

Roe J (2026). era: Year-Based Time Scales. R package version 0.5.0.9000, https://github.com/joeroe/era.

Corresponding BibTeX entry:

  @Manual{,
    title = {era: Year-Based Time Scales},
    author = {Joe Roe},
    year = {2026},
    note = {R package version 0.5.0.9000},
    url = {https://github.com/joeroe/era},
  }