Celebrating Eid without an established sighting is not correct
Question
(1) If someone, without seeing the moon, celebrates Eid on the 30th of Ramadan merely on radio news, will it be permissible or not? Celebrating Eid merely on radio news without a sighting (2) If news arrives by radio from the nearby city of Calcutta that, although the moon was not seen in Calcutta, since news of the moon is coming by radio from Dhaka, Delhi and other cities, Eid is being held in Calcutta on that basis — will it be permissible for the people of Calcutta to celebrate Eid on this news, and for the…
Answer
(1) If on the 29th the horizon is clear, so that there is no cloud, no dust, no smoke, no rain and no redness, then celebrating Eid on the 30th of Ramadan merely on such news from some radio that the moon has appeared in such-and-such a place is not correct. (2) Such news too is not sufficient. (3)
Source: Fatawa Mahmudiyya
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