Afghanistan uses three calendars: the Shamsi (solar Hijri) calendar is the official one, and its year starts at Nowruz, 1 Hamal; the Qamari (lunar Hijri) calendar is for religious days; and the Gregorian calendar is for dealing with the world. In Afghanistan the Shamsi months carry the names of the zodiac signs, from Hamal to Hut.
Qamari dates are calculated with the Umm al-Qura calendar. In Afghanistan a month begins when the new moon is sighted, so the date can be a day earlier or later.