Al-Hijra / Muharram in 2015 will start on Wednesday, the 14th of October and will continue for 29 days until Wednesday, the 11th of November.
Based on sightability in North America, in 2015 Al-Hijra / Muharram will start in North America a day later – on Thursday, the 15th of October.
Note that in the Muslim calander, a holiday begins on the sunset of the previous day, so observing Muslims will celebrate Al-Hijra / Muharram on the sunset of Tuesday, the 13th of October.
Although Al-Hijra / Muharram 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 Al-Hijra / Muharram moves in the Gregorian calendar approximately 11 days every year. The date of Al-Hijra / Muharram 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 Al-Hijra / Muharram. Note that these dates are based on astronomical calculations to affirm each date, and not on the actual sighting of the moon with the naked eyes. This approach is accepted by many, but is still being hotly debated