What Countries Use The Gregorian Calendar. Yes, there are several countries that do not use the gregorian calendar as their official calendar. The start date of the calendar is based on the hegira, the islamic prophet muhammad’s journey from mecca to medina.
Some countries follow the gregorian calendar, while others follow lunar or solar calendars. Four countries utilize an altered version of the gregorian calendar (with eras different from anno domini):
What Countries Use The Gregorian Calendar Images References :