French Revolutionary calendar dates — french

There are two versions of the French Revolutionary Calendar. The original version, used from 1793, was kept in sync with the solar year by setting the first day of Vendemiaire to the autumnal equinox. The second version, proposed in 1795, was a simpler arithmetic calendar, but was never used. We distinguish the two by using "afrench" (for Arithmetic French) for the second form.

Usage

french_date(year = integer(), month = integer(), day = integer())

afrench_date(year = integer(), month = integer(), day = integer())

as_french(date)

as_afrench(date)

Arguments

year: year
month: month
day: day
date: A vector of dates on some calendar

Value

A vector of dates on the French Revolutionary calendar

Examples

french_date(1, 1, 1:15) |>
  as_gregorian()
#> <gregorian[15]>
#>  [1] 1792-Sep-22 1792-Sep-23 1792-Sep-24 1792-Sep-25 1792-Sep-26 1792-Sep-27
#>  [7] 1792-Sep-28 1792-Sep-29 1792-Sep-30 1792-Oct-01 1792-Oct-02 1792-Oct-03
#> [13] 1792-Oct-04 1792-Oct-05 1792-Oct-06
french_date(1, 1, 1:15) |>
  day_of_week()
#>  [1] "Primidi"  "Duodi"    "Tridi"    "Quartidi" "Quintidi" "Sextidi" 
#>  [7] "Septidi"  "Octidi"   "Nonidi"   "Decadi"   "Primidi"  "Duodi"   
#> [13] "Tridi"    "Quartidi" "Quintidi"