Module calendrica-french-revolutionary
French Revolutionary calendar conversions (astronomical and arithmetic).
Ported from "Calendrical Calculations" (4th edition) by Nachum Dershowitz and Edward M. Reingold. Original Lisp code (CALENDRICA 4.0) is Apache 2.0 licensed.
Info:
- Release: 0.1 2026-07-19
Functions
| fixed_from_french (f_date) | Fixed date of astronomical French Revolutionary date `f_date`. |
| french_from_fixed (date) | Astronomical French Revolutionary date {year, month, day} for fixed `date`. |
| french_leap_year (f_year) | True if `f_year` is an astronomical French Revolutionary leap year. |
| arithmetic_french_leap_year (f_year) | True if `f_year` is an arithmetic French Revolutionary leap year. |
| fixed_from_arithmetic_french (f_date) | Fixed date of Arithmetic French Revolutionary date `f_date`. |
| arithmetic_french_from_fixed (date) | Arithmetic French Revolutionary date {year, month, day} of fixed `date`. |
Functions
- fixed_from_french (f_date)
-
Fixed date of astronomical French Revolutionary date `f_date`.
Parameters:
- f_date table French date {year, month, day}.
Returns:
-
number
Fixed date.
- french_from_fixed (date)
-
Astronomical French Revolutionary date {year, month, day} for fixed `date`.
Uses `round_half_to_even` to match Lisp's `round`.
Parameters:
- date number Fixed date.
Returns:
-
table
{year, month, day}
- french_leap_year (f_year)
-
True if `f_year` is an astronomical French Revolutionary leap year.
Parameters:
- f_year number French Revolutionary year.
Returns:
-
boolean
- arithmetic_french_leap_year (f_year)
-
True if `f_year` is an arithmetic French Revolutionary leap year.
Parameters:
- f_year number French Revolutionary year.
Returns:
-
boolean
- fixed_from_arithmetic_french (f_date)
-
Fixed date of Arithmetic French Revolutionary date `f_date`.
Parameters:
- f_date table Arithmetic French date {year, month, day}.
Returns:
-
number
Fixed date.
- arithmetic_french_from_fixed (date)
-
Arithmetic French Revolutionary date {year, month, day} of fixed `date`.
Parameters:
- date number Fixed date.
Returns:
-
table
{year, month, day}