1447 AH Islamic calendar

1447 AH runs 355 days — a Hijri year is twelve lunar months of 29 or 30 days, so it is about eleven days shorter than a Gregorian year. That difference is the reason Islamic dates move steadily earlier against the Gregorian calendar and work through every season over roughly thirty-three years, rather than staying in one.

The count begins at the Hijra, the migration from Mecca to Medina, which is why years carry AH — anno Hegirae. The months are purely lunar: no leap month is inserted to keep them in step with the solar year, which is what distinguishes this calendar from the Hebrew one.