A Muslim man uses binoculars to look for the position of the moon to mark the first day of the holy fasting month of Ramadan, on the roof of Al-Musyari'in mosque in Jakarta, Indonesia, on March 10, 2024.

Officials saw the crescent moon Sunday night in Saudi Arabia, home to the holiest sites in Islam, marking the start of the holy fasting month of Ramadan for many of the world's 1.8 billion Muslims.

The sacred month, which sees those observing abstain from food and water from sunrise to sunset, marks a period of religious reflection, family get-togethers and giving across the Muslim world. Seeing the moon Sunday night means Monday is the first day of the fast.