Why Eid al-Fitr Can Fall on Different Days Around the World

Eid al-Fitr is the festival on 1 Shawwal, the day after Ramadan ends. It can fall on different days in different countries for three reasons. Ramadan lasts either 29 or 30 days, depending on whether the new crescent is seen on the evening of the 29th. Communities use different rules for deciding that: a local sighting, a sighting from elsewhere, or a calculation. And the young crescent is easier to see from western longitudes than eastern ones, so the same evening can give different answers around the globe.

Key Takeaways

• Ramadan ends after 29 days if the Shawwal crescent is confirmed on the evening of the 29th, and after 30 days if it is not.
• Some communities follow their own local sighting, some accept a sighting from elsewhere, and some follow a calculation. Each choice can move Eid by a day.
• The crescent is older, and so easier to see, at sunset further west. The Americas often have a better chance than Asia or Australasia on the same date.
• In March 2026, Eid al-Fitr was Friday 20 March under the Fiqh Council of North America's calculation and Saturday 21 March in Singapore.

Ramadan ends after 29 or 30 days

An Islamic month never has a fixed length. In Sahih al-Bukhari 1913, the Prophet ﷺ describes the month as "sometimes of 29 days and sometimes of thirty days." The month of Ramadan follows the same rule.

What decides it is the crescent. In Sahih al-Bukhari 1909, the Prophet ﷺ said to start fasting on seeing the crescent and to "give up fasting on seeing the crescent (of Shawwal)," and, if the sky is overcast at the start of the month, to "complete thirty days of Sha'ban." For the end of Ramadan, the narration of Ibn Abbas in Sahih Muslim 1087 (discussed below) uses the same principle: "we will continue to fast till we complete thirty (fasts) or we see it (the new moon of Shawwal)." The Quran, in Surah al-Baqarah 2:185, speaks of completing the period. In the Sahih International translation of the meaning, it says Allah wants "for you to complete the period and to glorify Allah."

So the evening of 29 Ramadan is the moment of decision. If the new crescent is confirmed after sunset, the next day is Eid and Ramadan had 29 days. If it is not, people fast a 30th day and Eid follows. A 31st day of fasting does not happen, because the month cannot run past 30. Why months are only ever 29 or 30 days long is covered in why Islamic months have 29 or 30 days.

Two communities can therefore end Ramadan a day apart simply because one confirmed a sighting on the 29th and the other did not. If they also began Ramadan on different days, the gap can carry through to Eid.

Three ways communities decide

Muslims do not all use the same rule for whose sighting counts, and this is a major source of different Eid dates. The positions below are described, not ranked. For a personal decision, follow qualified scholars and your local mosque.

Local sighting

Many communities start Shawwal only when the crescent is seen in their own country or region. A frequently cited basis is the narration of Kurayb in Sahih Muslim 1087. Kurayb saw the Ramadan crescent in Syria on Friday night, while Ibn Abbas in Madinah had seen it on Saturday night. Ibn Abbas said they would keep fasting until they completed thirty or saw the crescent, and that "this is how the Messenger of Allah (ﷺ) has commanded us." The chapter heading on sunnah.com reads that each land has its own sighting.

A sighting from elsewhere

Other communities accept a confirmed sighting from another country, sometimes from anywhere in the world. A narration often discussed here is Sunan Abi Dawud 1157, graded Sahih (Al-Albani) on sunnah.com. Riders came to the Prophet ﷺ and testified that they had seen the new moon the previous day, and he told the people to break their fast and go out to the place of prayer the next morning. Some communities follow the announcement of one particular country for a similar reason. Saudi Arabia, for example, announces the start of Shawwal from sighting reports rather than from its printed calendar: van Gent's comparison of announced and calculated dates notes that the Umm al-Qura calendar "is intended for civil purposes only" and lists cases where the announced dates differed from it.

Calculation

Some bodies set the date in advance by astronomical calculation. The Fiqh Council of North America's announcement for Ramadan and Shawwal 1447 says it "recognizes astronomical calculation as an acceptable Shar'i method." Its criterion is that, at sunset somewhere on the globe, the Moon is at least 8 degrees from the Sun and at least 5 degrees above the horizon. Saudi Arabia's printed Umm al-Qura calendar is also calculated, but R.H. van Gent of Utrecht University notes in his introduction to the Umm al-Qura calendar that, around Ramadan and Dhu al-Hijja, the festival dates observed by communities following other methods, mainly sighting, can "differ by one, two or even three days" from that calendar.

The arguments on each side are set out in more depth in global vs local moon sighting and moon sighting vs calculation.

Why the crescent favours the west

The new moon (conjunction) is a single instant for the whole planet. The US Naval Observatory's moon phase tables give it in Universal Time (UT). Sunset, though, sweeps westward around the globe over roughly a day. A place where the Sun sets later, in UT terms, sees an older Moon at its sunset.

Age matters because a very young crescent is faint and close to the Sun. The USNO crescent visibility page says sighting the crescent within one day of new moon "is usually difficult." The earliest naked-eye sightings it accepts as reliable came about 15.5 hours after new moon, and 12.1 hours with a telescope. It also says visibility "cannot be predicted with certainty," because sky conditions and the observer matter too.

Here is how that plays out for the coming Eid. USNO gives the new moon of March 2027 as 8 March at 09:29 UT. We computed the Moon's age at sunset on Monday 8 March 2027, which is 29 Ramadan 1448 on the calculated Umm al-Qura calendar:

Sunset times were computed with the SunCalc library and are approximate to a few minutes. Moon age is the sunset time minus USNO's conjunction time, and the Moon altitudes quoted later come from SunCalc's lunar position at the same sunset, which is accurate only to a fraction of a degree. Age is only one factor, so this table is not a forecast of whether anyone will see the crescent. It does show the pattern: from Auckland to Los Angeles, the same calendar evening offers a Moon that ranges from not yet new to older than the USNO naked-eye record.

Time zones and the date line

The International Date Line makes the gap sharper. Places just west of it, such as New Zealand, are among the first to reach each new calendar day and the first to see its sunset. Their Moon is the youngest. The Americas, far to the east of it, see the same date's sunset last, with the oldest Moon.

This affects communities that accept a sighting from elsewhere. Suppose a crescent were confirmed at sunset in Los Angeles on 8 March 2027, at about 01:55 UT on 9 March. In Singapore (UT+8) that is already about 09:55 on the morning of 9 March. In Auckland (UT+13 in March) it is about 14:55 in the afternoon. By then the day has started and people there have already begun fasting it. A western sighting can arrive too late to make that same day Eid in the far east, which is one reason communities differ on how far a sighting should travel.

The Islamic day also begins at sunset, so "Eid on Tuesday" means the first night of Shawwal starts on Monday evening.

A worked example: Eid al-Fitr 1447 (March 2026)

Eid al-Fitr 1447 shows these factors in practice. USNO's tables put the new moon at 01:23 UT on 19 March 2026.

On the evening of Wednesday 18 March, sunset in Makkah, London and New York came before that conjunction. The Moon had not yet passed the Sun, so no crescent could be seen there that evening. Both bodies below ended up with a 30-day Ramadan.

• Friday 20 March. The Fiqh Council of North America, using its calculation, gave Friday 20 March as the first day of Shawwal. The calculated Umm al-Qura calendar also has 1 Shawwal 1447 on 20 March.
• Saturday 21 March. Singapore's Mufti announced on 19 March that the crescent was too low above Singapore's horizon at sunset to be seen under the criteria agreed by MABIMS member countries. Ramadan was completed at 30 days there, and 1 Syawal fell on Saturday 21 March.

Our own calculation agrees with that picture. At Singapore's sunset on 19 March, the Moon was only about 10 hours past conjunction and roughly 2 to 3 degrees above the horizon. At Makkah's sunset the same evening it was about 14 hours old, and at Los Angeles about 25 hours. Both dates were the result of a stated method applied carefully. Neither community made a mistake.

Common questions

Is one country's Eid date wrong?

Not necessarily. A different date usually reflects a different method or a different sky, not an error. Whether one method is preferable is a question for scholars, and Muslims have held more than one view on it since early times.

Can Eid differ by two days?

Yes, occasionally. A community that started Ramadan a day late and also completed 30 days can end up two days after one that started early and saw the crescent on the 29th. Van Gent's note that sighting-based festival dates can differ from the Umm al-Qura calendar by "one, two or even three days" shows that gaps larger than one day do happen.

Why does a calendar show a date before the announcement?

A printed or online Hijri calendar has to show a date months ahead, so it uses a calculation. A sighting can only be made on the evening itself. Treat the calendar date as a planning estimate.

Plan Eid with a provisional date

Start from the calculated date and keep it provisional until your community confirms it:

1. Check the calculated date on the Eid al-Fitr page or in the Shawwal 1448 month calendar. On the calculated Umm al-Qura calendar, 1 Shawwal 1448 is Tuesday 9 March 2027, after a 29-day Ramadan.
2. Note the evening of 29 Ramadan, when the decision is made, and plan for Eid to fall on either of the two following days.
3. Find out which method your mosque or national authority follows, and where it announces.
4. Watch the Moon's age around the end of the month on the moon phases page.

For keeping family plans and app settings in step with a local announcement, see our sister site Everyday Muslim's guide to using a Hijri calendar alongside local date announcements.