DUBAI, United Arab Emirates — 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. AdvertisementHowever, there are some Asia-Pacific countries like Australia, Brunei, Indonesia, Malaysia and Singapore, that will begin Ramadan on Tuesday after failing to see the crescent moon. Jordan will also begin Ramadan on Tuesday. Share this article ShareIn Iran, which views itself as the worldwide leader of Islam’s minority Shiites, authorities typically begin Ramadan a day after Sunnis start. The Palestinian territories will begin Ramadan on Monday as well.