What is Ramadan?

"One of the basic institutions, or five pillars, of Islam, Ramadan is the Islamic holy month of fasting. It is the ninth month on the Islamic calendar, which is based on a lunar cycle. 

Ramadan begins and ends with the official sighting of the new moon. During the month-long fast, able-bodied adults and older children fast during the daylight hours from dawn to dusk. "

You can read more about Ramadan on Britannica Kids