Rabi ul Awwal is the third month of the Islamic calendar and it is the month which comes after Safar. Rabi ul Awwal 2023 starts from 16 September to 15 October 2023. The word "Rabi" means "spring" and Al-awwal means "the first" in Arabic language, so "Rabi' al-awwal" means "The first spring" in Arabic language. The name seems to have to do with the celebration events in the month as "spring" is the end to winter (symbol of sadness) and consequently the start of happiness.
Mawlid - the birthday of the Islamic prophet, Muhammad is on the twelfth of this month,
The Islamic calendar is lunar and months begin when the first crescent of a new moon is sighted. The Islamic calendar year has 354 or 355 days in a year, which is 11 to 12 days shorter than the Gregorian calendar. The Gregorian calendar is a solar calendar based on the earth's revolution around the sun.