Persian Calendar
The Persian calendar is a solar calendar. A year of the Persian calendar has 12 months, the first six months have 31 days, the next five have 30 days, and the last month has 29 days or 30 days in leap years.
The Persian year starts at vernal equinox. Usually, on 21 March of the Gregorian calendar, the Persian year begins with 1 Farvardin. To find the corresponding year of the Gregorian calendar, add 621 or 622 to a Solar year.
The order, names, and lengths of Persian Months can be seen in the following table:
| 1 | 31 days | Farvardin | فروردین |
| 2 | 31 days | Ordibehesht | اردیبهشت |
| 3 | 31 days | Khordad | خرداد |
| 4 | 31 days | Tir | تیر |
| 5 | 31 days | Mordad | مرداد |
| 6 | 31 days | Shahrivar | شهریور |
| 7 | 30 days | Mehr | مهر |
| 8 | 30 days | Aban | آبان |
| 9 | 30 days | Azar | آذر |
| 10 | 30 days | Dei | دی |
| 11 | 30 days | BAhman | بهمن |
| 12 | 29/30 days | Esfand | اسفند |
Annual Holidays
In the Iranian calendar, every week begins on Saturday and ends on Friday. In most Islamic countries, Friday is the weekly holiday. In the below-mentioned holidays, which are mostly religious, all the historical sites and museums are not working.
| Occasion | 2015 | 2016 |
| Demise of Imam Khomeini | 4-5 June | 4-5 June |
| Martyrdom of Imam Ali | 8 July | 26 June |
| Martyrdom of Imam Jafar | 10 Aug | 30 July |
| Tasooa and Ashoora | 22-23 October | 10-11 October |
| Arba’in | 2 November | 20 November |
| Demise of Prophet | 10 December | 28 November |
