Calendar
From The Art and Popular Culture Encyclopedia
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A calendar is a system of organizing days for a social, religious, commercial or administrative purpose. This organization is done by giving names to periods of time - typically days, weeks, months and years. The name given to each day is known as a date. Periods in a calendar (such as years and months) are usually, though not necessarily, synchronized with the cycles of some astronomical phenomenon, such as the cycle of the sun, or the moon.
Many civilizations and societies have devised a calendar, usually derived from other calendars on which they model their systems, suited to their particular needs.
A calendar is also a physical device (often paper). This is the most common usage of the word. Other similar types of calendars can include computerized systems, which can be set to remind the user of upcoming events and appointments.
As a subset, 'calendar' is also used to denote a list of particular set of planned events (for example, court calendar).
