A calendar is a system of organizing days for social, spiritual, business, or administrative functions. The calendar will also be used for monitoring occasions, appointments, birthdays, and different vital dates.
The Gregorian calendar is essentially the most extensively used calendar on the planet as we speak. It was launched in 1582 by Pope Gregory XIII as a modification of the Julian calendar, which had been in use since 46 BC. The Gregorian calendar is a photo voltaic calendar, which means that it’s based mostly on the Earth’s orbit across the solar.