Irrespective of which calendar is observed, Mehrgān falls on the 196th day of the calendar year. For details on how this date is calculated, see basis for the date, below. For calendars that have March 21 as Nowruz or New Year's Day (i.e. in the "Fasili" and "Bastani" variants of the Zoroastrian calendar as well as in the Iranian civil calendar), Mehrgān falls on October 2. For the "Shahanshahi" variant of the Zoroastrian calendar, which in 2006–2007 has New Year's Day on August 20, Mehrgān fell on March 3 of the following Gregorian year. For the "Kadmi" variant, which has New Year's Day 30 days earlier, Mehrgān falls on February 1.