In Saudi Arabia, the first Shawwal is expected to start on Saturday.
The International Astronomy Centre said on Tuesday that Saudi Arabia probably won’t see the Shawwal moon on April 20 (Thursday).
The head of the astronomy station, Muhammad Shaukat, says that Eidul Fitr will happen on April 22 (Saturday) this year.
The Supreme Court of Saudi Arabia has told people to look at the moon with their own eyes on Thursday and tell the closest court to record their evidence.
Ramadan is a holy month that lasts either 29 or 30 days, based on when the moon is seen. If the moon is seen on Thursday, the Saudis will enjoy Eid on Friday, April 21.
Muslims all over the world enjoy Eid ul Fitr, a religious holiday that marks the end of the month-long fasting period of Ramadan.
The Eid events start early in the morning with prayers. Both old and young Muslims dress up in traditional clothes. After fasting for 29 or 30 days, families get together for their first meal together after breaking the fast.
People they care about get together and eat delicious foods, with sweets taking up most of the table.