One Ummat One Eid, Ramadan And One Laylati Alqadr
Ghamidi sb is of opinion that scientific method can be used to make calendars. I am giving my own opinion in this regard. Unity of ummah donot mean unity of eid or ramazan. Actual unity mean what Prophet mohammad saw has said see ( https://sunnah.com/muslim:2586d ). Note: I am rookie in astronomy but I will try to give answer. Firstly, Verse 2:185 says to start and end fasting upon sighting of moon. I am in strong favor we should use modern technology and astronomical models to sight moon. let first understand meaning of birth of new moon. Astronomically, birth of new moon occurs when earth, moon and sun, are approximately in a straight line. due to this reason we cannot see moon as no light can be reflected. Hence no visibility at all. This event can occur at any moment of day in terms of our location. I mean that its possible that new moon occur at night in pakistan but in US its morning. Let assume the new moon occurs at 11pm Universal Time (Sunday), then at that moment Pakistan time is 5am (Monday). Now tell me, how can England and Pakistan start the month on same day in this case? About moon visibility, there are several methods to calculate visibility of moons in different region. However, these models has been proven to deviate from reality. One of this studies were done by Pakistani meterological department. They observed that there were deviation in prediction due to several reason. You can find that report by visiting their web. Because of these reasons, whole muslim community cannot have single day for starting ramazan. I am of opinion that there is no issue in celebrating Eid on different days even with in Pakistan based on local sighting. Because it is a non issue which donot create any issue. Historically, Prophet Mohammad saw and Sahaba has endorsed celebration of Eid based on local sightings. However, Govt can make procedure (including scientific models and visually looking at moon) so that every one with in state celebrate on one day.