In Indonesia, which often disagrees with the Saudis over the Hilal, the official religious authorities insisted that celebrations could only begin on Tuesday evening.
The Royal Observatory last week said the crescent moon could only be seen in Britain on Wednesday, but that didn't stop hundreds of UK mosques from following the Saudi lead and starting celebrations on Monday.
Some astronomers in the Gulf suggested that the object the Saudis claim they saw in the sky on Monday night was in fact Saturn. The accusation has infuriated the Kingdom's notoriously authoritarian scholars who have begun preaching against those who claim they made a mistake.
According to the Arab News website, Saudi Arabia's Grand Mufti Abdul Aziz bin Abdullah al-Asheikh condemned the lunar naysayers at Friday prayers, accusing them of being "motivated and deviated people with foul mouths that cast doubt on our religion and should be silenced".
The dispute has been seized upon in Shia Iran, which is hostile towards Saudi Arabia because the country's intolerant strand of Wahabi Islam views the Shias as heretics.
The semi-official Fars news agency carried a report suggesting that the Saudis would have to pay kaffarah - an Islamic fine which is sometimes used by Muslims as recompense for missing a day's fasting or breaking an oath.
At the time of writing there was no such admission from the Saudi authorities.
- INDEPENDENT