There are 3 variants of the Zoroastrian calendar system.
The Kadmi and Fasli calendars are of historical interest only, though closely related to the Persian calendar used for some of the public holidays of Iran and Afghanistan. Only the Parsi Shenshai calendar (often simply referred to as Parsi) is currently used to determine the date of any official non-working public holidays anywhere in the world.
Holidays based on the Parsi Shenshai calendar consist of a Month/Day pair.
Parsi New Year (India)
See also: Recurrence Rules Options.