Ramadan 2027 is expected to begin on Monday February 8, although the exact start date will only be confirmed following the official sighting of the crescent moon. The holy month follows the Islamic lunar calendar, meaning its dates change every year on the Gregorian calendar. When is Ramadan 2027? Based on current astronomical predictions, Ramadan is expected to begin on Monday February 8, 2027, with the crescent moon expected to be observed on the evening of Sunday February 7. Unlike holidays that follow the Gregorian calendar, Ramadan is determined by the Islamic lunar calendar, which contains 12 lunar months and totals approximately 354 days.