To cite package ‘fmdates’ in publications use:

  Costigan I (2024). _fmdates: Financial Market Date Calculations_. R
  package version 0.1.4-99, ,
  <https://github.com/imanuelcostigan/fmdates>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fmdates: Financial Market Date Calculations},
    author = {Imanuel Costigan},
    year = {2024},
    note = {R package version 0.1.4-99, 
},
    url = {https://github.com/imanuelcostigan/fmdates},
  }