Module calendrica-persian
Persian 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_persian (p_date) | Fixed date of Astronomical Persian date `p_date`. |
| persian_from_fixed (date) | Astronomical Persian date {year, month, day} corresponding to fixed `date`. |
| fixed_from_arithmetic_persian (p_date) | Fixed date equivalent to arithmetic Persian date `p_date`. |
| arithmetic_persian_from_fixed (date) | Arithmetic Persian date {year, month, day} corresponding to fixed `date`. |
| arithmetic_persian_leap_year (p_year) | True if arithmetic Persian year `p_year` is a leap year. |
Functions
- fixed_from_persian (p_date)
-
Fixed date of Astronomical Persian date `p_date`.
Parameters:
- p_date table Persian date {year, month, day}.
Returns:
-
number
Fixed date.
- persian_from_fixed (date)
-
Astronomical Persian date {year, month, day} corresponding to fixed `date`.
Parameters:
- date number Fixed date.
Returns:
-
table
{year, month, day}
- fixed_from_arithmetic_persian (p_date)
-
Fixed date equivalent to arithmetic Persian date `p_date`.
Parameters:
- p_date table Persian date {year, month, day}.
Returns:
-
number
Fixed date.
- arithmetic_persian_from_fixed (date)
-
Arithmetic Persian date {year, month, day} corresponding to fixed `date`.
Parameters:
- date number Fixed date.
Returns:
-
table
{year, month, day}
- arithmetic_persian_leap_year (p_year)
-
True if arithmetic Persian year `p_year` is a leap year.
Parameters:
- p_year number Persian year.
Returns:
-
boolean