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, following the crescent search after sunset on Sunday 7 February 2027 (29 Shaban 1448). Ramadan is forecast to last 29 days, with Eid al-Fitr expected around Tuesday 9 March 2027 (some regions 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, after sunset on 7 February.

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 7 February 2027

By sunset on 7 February 2027, the Moon will be approximately 28 to 30 hours past conjunction, which is a healthy margin beyond the theoretical lower bound for visibility. Here is what the geometry looks like in practice.

ARCL (elongation) will be in the range of 18 to 22 degrees across most of the world at local sunset on 7 February. An elongation above roughly 10 to 12 degrees clears the Danjon limit, below which no crescent can form regardless of atmospheric conditions. At 18 to 22 degrees the crescent is well-formed and comparatively easy to detect with binoculars or a small telescope.

ARCV (arc of vision) varies by latitude and longitude but is expected to reach 12 to 18 degrees across West Africa, North Africa, southern Europe, and the Arabian Peninsula. Yallop's criterion places the boundary for optical-aid visibility at roughly ARCV above 5 degrees; the geometry on 7 February exceeds that threshold by a comfortable margin in these regions.

Crescent width W at an elongation of 18 to 22 degrees will be approximately 0.3 to 0.5 arcminutes, bright enough to be detected with binoculars against a twilight sky and potentially visible to experienced naked-eye observers under excellent conditions in the westernmost locations.

The upshot is that crescent sighting with optical aid is expected to be achievable across parts of North Africa and southern Europe on the evening of 7 February, and the crescent will be easily observable worldwide by 8 February. This gives high confidence that 1 Ramadan will be declared on Monday 8 February in Saudi Arabia and most countries. For the technical underpinning of the Danjon limit, see Danjon limit and crescent visibility physics.

A Rare Sky: The Eclipses Bracketing Ramadan 2027

Ramadan 2027 opens and is punctuated by two eclipses that make 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 approximately 16:00:48 UTC, with an annular phase visible along a path crossing North Africa, the Arabian Peninsula, and parts of South Asia. Outside the annular path, a partial eclipse will be visible across a far wider region. 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 7 February the crescent may set before the sky darkens sufficiently for naked-eye observation at the latitudes of South Asia, which could push their official start to the following evening.

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; between 0.216 and minus 0.014 it is visible with care; between minus 0.014 and minus 0.160 it needs optical aid; below that it is not sightable even with a telescope. The q-value for most of the Arab world and Africa on 7 February 2027 is expected to fall in the binocular-visible range.

Odeh V-value is a related index derived from ARCL and W. V below 0.9 means easily visible naked-eye; between 0.9 and 2.2 requires a trained observer; between 2.2 and 5.65 needs binoculars; above 5.65 is not visible even optically. Odeh's criterion has been validated against the International Crescent Observation Project (ICOP) database of several hundred confirmed sighting records.

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. The crescent search takes place after sunset on Sunday 7 February 2027 (29 Shaban 1448). 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 is forecast to last 29 days (Islamic months are either 29 or 30 days). Eid al-Fitr is expected around Tuesday 9 March 2027, with some regions celebrating on Wednesday 10 March 2027 depending on the crescent sighting for Shawwal.

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.

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.