When Does Ramadan 2027 Start? Crescent Moon Forecast for 1448 AH

The Short Answer: When Ramadan 2027 Is Expected to Begin

Ramadan 2027 (1448 AH) is expected to begin on Monday 8 February 2027 in Saudi Arabia and most of the world, because no crescent can be seen anywhere on the evening of Saturday 6 February 2027 (29 Shaban 1448 in the Umm al-Qura calendar), so Shaban completes 30 days. Communities whose Shaban began a day later search for the crescent after sunset on Sunday 7 February 2027 instead. Under the Umm al-Qura rule Ramadan lasts 29 days and Eid al-Fitr falls on Tuesday 9 March 2027; communities that need a visible crescent cannot see it on the evening of 8 March, so they complete 30 days and celebrate on Wednesday 10 March 2027. For the full picture of Islamic celebrations in 2027, see Eid al-Fitr and Eid al-Adha 2027.

As with every Islamic month, this date is a forecast. It becomes certain only once religious authorities have received confirmed crescent-sighting reports, or have applied their chosen calculation method, on the evening of the 29th of Shaban.

Ramadan 2027 Key Dates (1448 AH)

All dates are subject to crescent visibility and the methodology used by each country's religious authority.

Why the Ramadan 2027 Date Is a Forecast, Not a Certainty

The Islamic calendar is rooted in direct observation of the sky. The Prophet Muhammad (peace be upon him) instructed believers to begin fasting when the crescent is sighted and to end when it is sighted again (Sahih al-Bukhari 1909). That instruction means four sources of uncertainty are baked into every month-start prediction.

First, physical sighting is the gold standard in most traditions. A calculation can tell you that the crescent geometry is favourable, but it cannot replace a human observer confirming what their eyes or optical instrument actually detected on a particular evening. Cloud cover, dust haze, and humidity can erase an otherwise sightable crescent in minutes.

Second, weather is unpredictable months in advance. February skies over the Arabian Peninsula and North Africa are frequently clear, but not guaranteed to be so. A single cloudy horizon in Mecca can shift the official Saudi announcement by one day, which then cascades to dozens of countries that follow that verdict.

Third, different communities use different methodologies. Some rely on local naked-eye sighting within national borders. Others accept a confirmed sighting from anywhere on Earth (global sighting). A growing number use pure astronomical calculation, treating a favourable crescent geometry as sufficient even without a physical report. None of these approaches is universally binding, and each can yield a different start date.

Fourth, the Umm al-Qura calendar is a civil administrative tool, not a sighting verdict. Saudi Arabia's official printed calendar is issued months in advance and helps people plan leave, school terms and business schedules. Its pre-printed dates are sometimes revised when actual sighting outcomes differ. Treat Umm al-Qura dates as the best available advance estimate, not a guaranteed announcement.

One important clarification: moon age is not a visibility criterion. The age of the Moon, meaning the number of hours elapsed since conjunction, is frequently quoted in popular media but plays no role in the Yallop or Odeh visibility models. The real drivers are ARCV (arc of vision, the altitude separation between Moon and Sun at sunset), ARCL (elongation, the angular separation between the two bodies), crescent width W, DAZ (the azimuth difference between Moon and Sun), and lag time (the interval between sunset and moonset). For a thorough explanation of how these quantities combine into a visibility prediction, see the science behind the crescent.

The Crescent Geometry for 6 and 7 February 2027

On the evening of Saturday 6 February there is no crescent to see. The new moon (conjunction) is at 15:56 UTC, which is after sunset across the Arab world, so the Moon has not yet reached conjunction there at sunset, and further west it is only a few hours old. Scanning the whole world, the best result anywhere is Zone E, in the central Pacific.

By sunset on Sunday 7 February 2027 the Moon is between about 19 and 30 hours past conjunction, depending on where you are: about 23 hours in Mecca and Cairo, 26 to 27 hours in Casablanca, Lagos and Dakar, and 30 hours in New York. Here is what the geometry looks like for the communities that search for the crescent that evening.

ARCL (elongation) is about 9 to 14 degrees across the cities in our tables, for example 10.8 degrees in Mecca, 12.1 in Casablanca and 14.1 in New York. That is above the Danjon limit, so a crescent exists everywhere, but a thin one.

ARCV (arc of vision) is about 8 to 11 degrees from the Arabian Peninsula to West Africa (9.3 in Mecca, 10.4 in Casablanca, 11.1 in Dakar), and lower in South and Southeast Asia (7.8 in Dhaka, 6.4 in Jakarta), where the Moon is younger at sunset.

Crescent width W is about 0.25 to 0.36 arcminutes in the Arab world and West Africa (0.26 in Mecca, 0.36 in Dakar), about 0.18 to 0.22 in Karachi, Dhaka and Jakarta, and 0.45 in New York. A crescent that thin is faint against the twilight sky and normally needs binoculars or a telescope to find.

In Yallop's classification, the evening of 7 February is Zone B (visible in clear skies) in Morocco, Algeria, West Africa and Madrid; Zone C (optical aid helpful) across most of the Arab world, Turkey and much of Europe, including Mecca; Zone D (telescope only) in Karachi; and Zone E (not visible) in Dhaka and Jakarta. Zone A (easily visible) appears only in the Americas. Of the 86 cities in our tables, 7 are Zone A, 13 Zone B, 32 Zone C, 7 Zone D and 27 Zone E.

The upshot is that Ramadan is expected to begin on Monday 8 February in Saudi Arabia and most countries with high confidence, because Shaban completes 30 days there. For communities that search on the evening of 7 February, a sighting with optical aid is expected to be achievable across the Arab world, and in clear skies in Morocco and West Africa, but not in South and Southeast Asia, where the crescent is below the optical-aid threshold. For the technical underpinning of the Danjon limit, see Danjon limit and crescent visibility physics.

A Rare Sky: Two Eclipses Around Ramadan 2027

Ramadan 2027 is preceded by an annular solar eclipse two days earlier and interrupted by a penumbral lunar eclipse in its second week, which makes this an astronomically remarkable month.

The annular solar eclipse of 6 February 2027 occurs on the same day as the astronomical new moon (conjunction). This is not a coincidence: solar eclipses can only happen at new moon, when the Moon passes in front of the Sun. The greatest eclipse is at about 15:59 UTC, off the coast of southern Brazil. The annular path runs from the South Pacific across southern Chile and Argentina and the South Atlantic, and ends at sunset over the Gulf of Guinea, so it does not cross the Arabian Peninsula, North Africa or South Asia, and a partial eclipse is visible only from much of South America and parts of West Africa. For the full picture, see the annular solar eclipse of 6 February 2027 and the Ramadan 1448 crescent. The eclipse itself is of no practical consequence for crescent sighting, since the Moon is invisible at conjunction regardless; the crescent search takes place more than 24 hours later on 7 February.

A penumbral lunar eclipse on 20 to 21 February 2027 falls near the midpoint of Ramadan, at full moon. A penumbral eclipse is subtle and the Moon does not turn dramatically red, but attentive observers will notice a slight dimming of one limb as it passes through Earth's outer shadow. It is a genuine astronomical event occurring during one of the holiest periods of the Islamic year.

Both eclipses are well-documented. Details of the annular solar eclipse are available from EclipseWise (Fred Espenak), and the penumbral lunar eclipse is described on Wikipedia. These are remarkable astronomical coincidences and carry no ominous significance; they are simply a consequence of orbital geometry.

Will Every Country Start Ramadan 2027 on the Same Day?

The short answer is probably not, for reasons that have nothing to do with the astronomy.

Countries most likely to start on Monday 8 February 2027: Saudi Arabia, the United Arab Emirates, Qatar, Egypt, Morocco, Turkey, Indonesia, Malaysia, the United Kingdom, the United States, Canada, and Australia. These countries either follow the Saudi announcement, conduct their own crescent searches with relatively permissive criteria, or use astronomical calculation.

Countries more likely to start on Tuesday 9 February 2027: Pakistan, India, and Bangladesh have historically applied stricter local sighting criteria, requiring the crescent to be observed within their own borders by multiple independent witnesses. On the evening of 7 February the crescent is a telescope-only target in Karachi (Zone D) and is not visible in Dhaka (Zone E), so a confirmed local sighting there is unlikely, which could push their official start to Tuesday 9 February.

The underlying disagreement is sometimes called the matla debate: whether the sighting of the crescent at any single location on Earth suffices for all Muslims everywhere (global sighting), or whether the crescent must be sighted within one's own region or country (local sighting). This is a centuries-old jurisprudential question with respected scholarly positions on both sides. For a full treatment, see why Muslims start Ramadan on different days.

How to Confirm Ramadan 2027 for Your Exact Location

The two principal scientific visibility criteria give you a rigorous way to evaluate the crescent prospects for any location and date.

Yallop q-value combines ARCV and W into a single index. A q-value above 0.216 means the crescent is easily visible to the naked eye (Zone A); between -0.014 and 0.216 it is visible under perfect conditions (Zone B); between -0.160 and -0.014 it may need binoculars to locate (Zone C); between -0.232 and -0.160 it is visible only with optical aid (Zone D); below -0.232 it is not visible even with a telescope (Zones E and F). On the evening of 7 February 2027 the q-value is about +0.06 in Casablanca (Zone B), -0.09 in Mecca (Zone C), -0.20 in Karachi (Zone D) and -0.43 in Jakarta (Zone E).

Odeh V-value is a related index derived from ARCV and W, and a higher V means a more visible crescent. V of 5.65 or more means easily visible to the naked eye; between 2 and 5.65 it needs optical aid first and may then be seen with the naked eye; between -0.96 and 2 it is visible with optical aid only; below -0.96 it is not visible even with optical aid. Odeh's criterion has been validated against the International Crescent Observation Project (ICOP) database of several hundred confirmed sighting records. On 7 February 2027 the V-value is about 5.3 in Casablanca, 3.8 in Mecca, 2.7 in Karachi and 0.4 in Jakarta.

Neither criterion uses moon age. If you see a headline claiming "the moon will be X hours old", that figure gives you no reliable information about whether the crescent will actually appear in your sky.

The most practical approach is to use Hilal Vision's live sky-dome tool, which computes ARCV, ARCL, W, DAZ and q-value for your precise latitude and longitude at local sunset. You can preview the 7 February 2027 geometry right now from the interactive moon phases dashboard and watch the crescent probability update as the date approaches.

Frequently Asked Questions

When does Ramadan 2027 start?

Ramadan 2027 is expected to begin on Monday 8 February 2027 in most countries. In the Umm al-Qura calendar 29 Shaban 1448 is Saturday 6 February 2027, and no crescent can be seen anywhere that evening, so Shaban completes 30 days. Communities whose Shaban began a day later search for the crescent after sunset on Sunday 7 February 2027. Some countries, particularly in South Asia, may officially start on Tuesday 9 February 2027 if the crescent is not confirmed locally on the evening of the 7th.

Why might Ramadan 2027 start on different days in different countries?

Different countries apply different sighting methodologies. Some accept a crescent sighting from anywhere in the world (global sighting); others require the crescent to be observed within their own national borders (local sighting); others use pre-calculated astronomical tables. The jurisprudential debate over which approach is correct, sometimes called the matla question, has produced different valid scholarly positions over centuries of Islamic scholarship.

Is the Ramadan 2027 date confirmed?

No. All Islamic month start dates are forecasts until the crescent is actually sighted or, in calculation-based systems, until the month officially begins. The dates given in this article reflect the best available astronomical modelling as of mid-2026. They carry a high level of confidence but are not certainties.

How long is Ramadan 2027 and when is Eid al-Fitr?

Ramadan 2027 lasts 29 days under the Umm al-Qura rule and 30 days for communities that need a visible crescent (Islamic months are either 29 or 30 days). Eid al-Fitr is Tuesday 9 March 2027 under Umm al-Qura and Wednesday 10 March 2027 for those communities, because no crescent can be seen on the evening of 8 March. Thursday 11 March 2027 is possible only if cloud or haze hides the otherwise easily visible crescent of the evening of 9 March.

Does the Moon's age decide when Ramadan starts?

No. Moon age (hours since conjunction) is not a parameter in either the Yallop or Odeh visibility criteria and is a poor predictor of whether the crescent can actually be seen. The real drivers are ARCV (arc of vision), ARCL (elongation), crescent width W, DAZ (azimuth difference) and lag time. A young moon with favourable geometry can be sightable; an older moon with unfavourable geometry may not be. Always use the proper geometric criteria, not age.

See Also

• Ramadan Through the Seasons: How Long the Days of Ramadan Are, Year by Year, from London to Cape Town
• Does the Umm al-Qura Calendar Follow the Crescent? 300 Months Checked Against the Sky
• Islamic calendar 2027: every Hijri month and the holidays of 1448 and 1449
• Ramadan dates 2027 to 2035

References

• Yallop, B. D. (1997). A Method for Predicting the First Sighting of the New Crescent Moon. NAO Technical Note No. 69, HM Nautical Almanac Office.
• Odeh, M. S. (2004). New Criterion for Lunar Crescent Visibility. Experimental Astronomy, 18, 39 to 64.
• EclipseWise (Fred Espenak / NASA). Annular Solar Eclipse of 2027 Feb 06. https://www.eclipsewise.com/solar/SEprime/2001-2100/SE2027Feb06Aprime.html
• Wikipedia. February 2027 lunar eclipse. https://en.wikipedia.org/wiki/February_2027_lunar_eclipse
• datehijri.com. Ramadan 1448 calendar. https://datehijri.com/en/hijricalendar-ramadan-1448.html
• Moonsighting.com. Moonsighting for Ramadan 1448. https://www.moonsighting.com/1448rmd.html
• Sahih al-Bukhari 1909 (Prophetic instruction to fast on sighting the crescent).

Clear skies and happy sighting.