According to the opinion of Imam Ash-Shaf'I and others every region is to take into consideration its own sighting and not to follow the sighting of others.
If The Moon Is Seen In One City But Not Another "Reliance of the traveller"i1.9 - If the moon is seen in one city but not another, then if the two are close (O: i.e. in the same region),the ruling (n: that the new month has come) holds for both. But if the two are not close, then not. ( O: i.e. the people far from the place where it was seen are not obliged to fast ); not close meaning in different regions, such as the Hijaz, Iraq, and Egypt.
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What is Ikhtilaful-Matali' and what is Ittihadul-Matali'?
The Islamic calendar is a purely lunar calendar. It contains 12 months that are based on the motion of the moon. The calendar is based on the Qur'an (Sura IX, 36-37) and its proper observance is a sacred duty for Muslims. Each month starts when the lunar crescent is first seen (by a human observer's eye) after a new moon.
Hilal, in Arabic is not the astronomical new moon but the crescent that can be sighted by average naked eye.
Although new moons may be calculated quite precisely, the actual visibility of the crescent is much more difficult to predict. It depends on factors such as weather, the optical properties of the atmosphere, and the location of the observer. It is therefore very difficult to give accurate information in advance about when a new month will start.
Furthermore, some Muslims depend on a local sighting of the moon, whereas others depend on a sighting by authorities somewhere else (especially Saudi Arabia) in the Muslim world.
Both sides claimed valid Islamic practices, and this issue is responsible for different starting & ending days for Ramadan even within a country. |
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Question: Is it not possible have Eid on the same day throughout the whole world after the actual sighting of the crescent?
Answer: It is not possible to have EID on the same day throughout the whole world after the actual sighting of the crescent, because, when the moon is sighted for example in Hawaii around 6:00pm, it will be 2:00pm of the next day in Japan, and 4:00pm of the next day in New Zealand