We follow Georgian Calender.
The Islamic calendar month only has 28 days, where as the Georgian calendar month varies between 28 and 31 days (depending on the month). This means that the Islamic calendar is shorter than the Georgian calendar by approximately 11 days every year. For this reason Islamic religious evens such as the Holy month of Ramadan, migrate forward each year by about 11 days. Christian religious events tend to remain on the same day of the Georgian calendar each year (or within a few days).
It didn't.
April 26, 570 AD
from 1432 years ago by Islamic calendar and 1390 years ago by Georgian calendar
It was named the Georgian planet by its discoverer William Herschel, after George III, King of England. But internationally the name Uranus was agreed soon after.
The Julian Calendar is named for Julius Caeser.
The mission to the badlands was set on Stardate 48315.6 (In Georgian calendar: April 26, 2371), so this is when it started. They did not get home until Stardate 54973.4 (In Georgian calendar: December 22, 2377).
A Georgian luger named Nobar Kumartashivili
The names of the months in the Jewish calendar in the order they appear: Nissan, Iyar, Sivan, Tamuz, Av, Elul, Tishrei, Cheshvan, Kislev, Tevet, Shevat, Adar (I and II). The Georgian calendar is based on the solar year, while the Jewish (and Muslim) calendar is based on the lunar year; therefore, correlation of holy days can only be done on an annual basis.
H. J. has written: 'The pancronometer or universal Georgian calendar, adjusted to the Gregorian and Julian accounts' 'The pancronometer, or univesal Georgian calendar'
It is named after Pope Gregory XIII, though he did not invent it.