July 2007 (20 جمادى الآخرة 1428). Retrieved on 29 October 2009. Archived 2016-03-03 at the Wayback Machine شقير, حوار ـ علي بن (2006-10-30). "هناء حجار"...

Islamic calendar, which had alternating 30- and 29-day months in each lunar year plus eleven leap days every 30 years. For example, al-Biruni mentioned...

into a series of twelve wulan/sasi or lunar months. Each consists of 29 or 30 days. This is adapted from the use of months in the Islamic calendar. The...