The Parsis have three calendars — Shahenshahi, Kadmi and Fasli. The Fasli Navroz falls on the same date of the Gregorian calendar, March 21, every year. To me this is the most accurate calendar as it adds one extra day every four years, while the Shahenshahi and Kadmi calendars go back by a day every four years because they do not have leap years. There are 12 months of 30 days each plus the five gathas, accounting for 365 days a year, so every four years they go back one day. The Kadmi calendar added an extra day every four......