But astronomers, who differed on the start of the holy month of Ramadan based on astronomical calculations, are at it again. They are now debating whether Eid Al-Fitr, which marks the end of the fasting month, will fall on Tuesday or Wednesday. The controversy over the start of Ramadan is also driving the debate. The Saudi Astronomical Society expects Ramadan to be 30 days this year and, if that is the case, it will end on Tuesday, Aug. 30, with the Eid falling on Wednesday, Aug. 31. The society said the moon would not be sighted on the night of Monday, Ramadan 29 (Aug. 29) thus Eid would not be on Tuesday.