The Islamic Year is based on a fully lunar calendar, meaning that time is counted based on how long it takes for the moon to orbit Earth. There are 12 months per Islamic year, with each month beginning with the new moon. It takes the moon about 29.5 days to change from new moon to new moon, and one calendar year is approximately 354 days. (This is why Muslim holiday dates change every year on the Gregorian calendar because the lunar calendar is shorter than the solar calendar.)


























