Calendar
From Simple English Wikipedia, the free encyclopedia
A calendar is a system for assigning calendar dates to days. The dates may be based on how things in the sky seem to move, like the Sun or moon.
A calendar is also something (often paper) that shows the system in writing (for example, a desktop calendar).
The term is also used to mean a set of planned events (for example, court calendar). The calendar most commonly used by people is the Gregorian Calendar.