Ten causes of disagreement in establishing the moon sighting
Question
Your institution, Dar al-'Ulum Deoband, and its fatwa department (Dar al-Ifta) hold a central position in the Islamic world; its decisions and fatwas are accepted and acknowledged everywhere, in India and beyond India, and all eyes are turned towards you. For this reason, if it does not weary your hearing, and provided my impertinence is forgiven along the way, I venture to put a few matters before you.
Answer
(1) Confusion and disagreement over the moon have always existed and always will; it was so in the centuries whose goodness has been attested, and in the era of the Rightly Guided Caliphate too. To strive to end this disagreement is to contend with nature itself.
Source: Fatawa Mahmudiyya
Preview. The full text opens with JavaScript enabled.