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.

Version:	0.3.0
Published:	2025-03-28
DOI:	10.32614/CRAN.package.jalcal
Author:	Abdollah Jalilian [aut, cre], Kazimierz M. Borkowski [ctb]
Maintainer:	Abdollah Jalilian <stat4aj at gmail.com>
BugReports:	https://github.com/jalilian/jalcal/issues
License:	GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
URL:	https://github.com/jalilian/jalcal
NeedsCompilation:	no
Materials:	README
In views:	TimeSeries
CRAN checks:	jalcal results

Documentation:

Downloads:

Linking:

Please use the canonical form https://CRAN.R-project.org/package=jalcal to link to this page.