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jalcal: Convert Between Jalaali (Persian or Solar Hijri) and Gregorian
Calendar Dates
The Jalaali calendar, also known as the Persian or Solar Hijri
calendar, is the official calendar of Iran and Afghanistan. It starts on
Nowruz, the spring equinox, and follows an astronomical system for
determining leap years. Each year consists of 365 or 366 days, divided into
12 months. This package provides functions for converting dates between the
Jalaali and Gregorian calendars. The conversion calculations are based on
the work of Kazimierz M. Borkowski (1996) (<doi:10.1007/BF00055188>), who
used an analytical model of Earth's motion to compute equinoxes from AD 550
to 3800 and determine leap years based on Tehran time.
Documentation:
Downloads:
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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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[aut, cre],
Kazimierz M. Borkowski [ctb]