Ramadan Dates Calculator (When Does Ramadan Start and End?)

How it works

Tabular Islamic calendar: day number of 1 Ramadan of Hijri year H = 1 + ⌈29.5 × 8⌉ + 354 × (H − 1) + ⌊(3 + 11H) ÷ 30⌋ + 1,948,439 (Julian Day Number) · Hijri leap years (355 days) are years 2, 5, 7, 10, 13, 16, 18, 21, 24, 26 and 29 of each 30-year cycle · Ramadan lasts 29 or 30 days; Eid al-Fitr is 1 Shawwal

Ramadan is the ninth month of the Islamic lunar calendar, which is about 11 days shorter than the solar year, so Ramadan moves earlier every year and cycles through all seasons in about 33 years. The calculator uses the arithmetic (tabular) Islamic calendar, which matches the Umm al-Qura calendar of Saudi Arabia for the start of Ramadan in recent years. In practice, each country or community starts and ends the fast when the new crescent moon is seen or officially announced, which can shift the dates by one day — use the adjustment to see that case. Every day of Ramadan begins at sunset the evening before.

Worked example

For 2027 with no sighting adjustment, 1 Ramadan 1448 AH falls on Monday, February 8, 2027, so the first tarawih prayer is on the evening of Sunday, February 7. Laylat al-Qadr (the 27th night) begins on the evening of Friday, March 5; the last fast is Monday, March 8 if the month has 29 days or Tuesday, March 9 if it has 30; and Eid al-Fitr is Wednesday, March 10, 2027 by the calculated calendar (Tuesday, March 9 after a 29-day month).

Sources: Reingold & Dershowitz, Calendrical Calculations (Cambridge University Press) · Umm al-Qura calendar — King Abdulaziz City for Science and Technology

Frequently asked questions