Is It Haram to Fast on Eid? What Islam, Judaism, and Christianity Say

Judaism doesn't have a holiday called Eid, but the underlying question — whether fasting on a sacred festive day is permitted — has a direct parallel in Jewish law. The Mishnah in tractate Ta'anit is explicit that communal fasts may not be decreed on days like Purim, Hanukkah, and Rosh Chodesh (New Moon) Mishnah Taanit 2:10. These are days designated for joy, and imposing a fast would contradict their essential character.

Rabbi Meir and Rabban Gamliel debated the nuances: Rabban Gamliel held that an already-begun fast sequence isn't interrupted, but Rabbi Meir countered that on days with special observances, the fast is at minimum not completed Mishnah Taanit 2:10. This disagreement — recorded in the Mishnah, redacted around 200 CE — shows the rabbis took the tension between mourning-fasts and festive days seriously.

The principle is clear enough: festive days in Judaism carry an obligation of simcha (joy), and voluntary or communal fasting on such days is at best discouraged and at worst prohibited depending on the specific day and context Mishnah Taanit 2:10.

Not applicable. Eid al-Fitr and Eid al-Adha are Islamic celebrations with no direct Christian counterpart; the retrieved passages contain no Christian scripture or teaching addressing fasting on these specific occasions.

Yes — it's unambiguously haram to fast on Eid. The prohibition comes directly from the Prophet Muhammad ﷺ and is recorded in some of the most authoritative hadith collections. Abu Huraira reported that the Messenger of Allah ﷺ explicitly forbade fasting on both Eid al-Fitr and Eid al-Adha Sahih Muslim 2672. This isn't a scholarly opinion or a derived ruling — it's a direct prophetic prohibition, which in Islamic jurisprudence elevates the act to haram rather than merely makruh (disliked).

The ruling is reinforced by a separate narration involving Ibn Umar. When a man explained he had vowed to fast every Tuesday or Wednesday for life, and worried about what to do if that day fell on Eid al-Adha, Ibn Umar replied plainly: 'we are forbidden to fast on the day of Nahr' Sahih al Bukhari 6706. Notably, Ibn Umar didn't offer a workaround — he simply repeated the prohibition. Classical scholars like Ibn Qudama (d. 1223 CE) and later Ibn Hajar al-Asqalani (d. 1449 CE) treated this as settled consensus across the four major Sunni schools of law.

The reasoning is theological as well as legal. Eid is a day Allah designated for communal celebration and gratitude — fasting on it is seen as rejecting that divine gift. Some scholars note a contrast with Ashura, which shifted from obligatory to voluntary fasting after the advent of Islam Sahih Muslim 2639, illustrating that the Prophet ﷺ carefully distinguished which days were for fasting and which were not.

There's no meaningful scholarly disagreement on this point. Whether you follow the Hanafi, Maliki, Shafi'i, or Hanbali school, fasting on either Eid is forbidden.

Not applicable. Concerns Islamic scripture/practice; no direct counterpart.

Not applicable. Concerns Islamic scripture/practice; no direct counterpart.

Short answer: It’s haram to fast on the two Eids. The Prophet explicitly forbade fasting on Eid al-Fitr and Eid al-Adha. Sahih Muslim 2672

Even if someone vowed a recurring fast that lands on Eid al-Adha (Day of Nahr), Ibn ‘Umar answered that vows don’t permit fasting that day because we are forbidden to fast on the Day of Nahr. Sahih al Bukhari 6706

Don’t confuse this with ‘Ashura: A’isha explains that ‘Ashura was treated as a voluntary fast in Islam—distinct from the Eids, which are days of eating and celebration. Sahih Muslim 2639