The Islamic New Year (Arabic: رأس السنة الهجرية‎ Ras as-Sanah al-Hijriyah) is the day that marks the beginning of a new Islamic calendar year, and is the day on which the year count is incremented. The first day of the year is observed on the first day of Muharram, the first month in the Islamic calendar.

 Date with respect to Gregorian calendar
Since the Islamic year is 11 to 12 days shorter than the Gregorian year, the Islamic new year does not come on the same day of the Gregorian calendar every year. While some Islamic organizations prefer determining the new month (and hence the new year) dates by local sighting of the moon, most Islamic institutions and countries, including Saudi Arabia, follow astronomical calculations to determine future dates of the Islamic calendar. The following dates on the Gregorian calendar correspond to the Islamic new year:

Islamic Year	Gregorian Date
1426 AH	10 February 2005
1427 AH	31 January 2006
1428 AH	20 January 2007
1429 AH	10 January 2008
1430 AH	29 December 2008
1431 AH	18 December 2009
1432 AH	7 December 2010
1433 AH	26 November 2011
1434 AH	14 November 2012
1435 AH	3 November 2013