Ramadan is not uniformly observed globally — the start date can vary by country or even be different mosque to mosque in the same city for a variety of reasons. But it all starts with a sighting of the crescent moon.

Ramadan 2025, the holy month of fasting will begin after crescent moon sighting. This year, a rare alignment of Islamic and Gregorian calendars occurs, with fasting possibly starting on March 1 for many countries.

However, unlike other religious holidays, Ramadan doesn't start on the same day each year. This is because the Islamic calendar follows the moon's cycle. And what can be even more confusing is that different groups might give slightly different dates for when Ramadan starts,