When is Ramadan in 2017? Ramadan in 2017 will start on Saturday, the  27th of May  and will continue for 30 days until Sunday, the  25th of June . Note that in the Muslim calander, a holiday begins on the sunset of the previous day, so observing Muslims will celebrate Ramadan on the sunset of Friday, the 26th of May. Although Ramadan is always on the same day of the Islamic calendar, the date on the Gregorian calendar varies from year to year, since the Gregorian calendar is a solar calendar and the Islamic calendar is a lunar calendar. This difference means Ramadan moves in the Gregorian calendar approximately 11 days every year. The date of Ramadan may also vary from country to country depending on whether the moon has been sighted or not. The dates provided here are based on the dates adopted by the  Fiqh Council of North America  for the celebration of Ramadan. Note that these dates are based on astronomical calculations to affirm each date, and not on the actual sighti