Establishing the First of the Month Taking into Account the Moon Characteristic of the Next Days
Establishing the First of the Month Taking into Account the Moon Characteristic of the Next Days

Establishing the First of the Month Taking into Account the Moon Characteristic of the Next Days
41. If on the evening of Eid ul-Fitr, the moon appears as a very fine crescent having the same characteristic of the new crescent, does it mean that the next day is the first of Shawwāl and that the Eid was declared by mistake? Is one required to perform qaḍā’ for the last day of Ramadan?
A: The thinness or thickness of the moon and also its size and position in the sky are not shar‘ī evidence in deciding the first or second of a month. But if it brings conviction to the mukallaf, he is obligated to act in accordance with his knowledge in this case.
42. Can the night of the full moon, which is the fourteenth night of the month, be taken as a reliable basis for calculating the first day of the month so as to determine whether the Day of Doubt was the thirtieth of Ramadan and to apply its rule, for example, so that all who did not fast on that day may have evidence concerning the necessity to perform qaḍā’ for the thirtieth day of Ramadan and whoever fasted that day, considering Ramadan to continue, may know that he is free of obligation?
A: That which has been mentioned does not constitute shar‘ī evidence for anything mentioned. However, if it brings knowledge to the mukallaf, his obligation is to act in accordance with his knowledge.
Source: Hadana adopted from the Istiftaat of the Grand Ayatollah Khamenei