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Calendar

A calendar is a system of organizing units of time for the purpose of reckoning time over extended periods. By convention, the day is the smallest calendrical unit of time; the measurement of fractions of a day is classified as timekeeping. The generality of this definition is due to the diversity of methods that have been used in creating calendars. Although some calendars replicate astronomical cycles according to fixed rules, others are based on abstract, perpetually repeating cycles of no astronomical significance. Some calendars are regulated by astronomical observations, some carefully and redundantly enumerate every unit, and some contain ambiguities and discontinuities. Some calendars are codified in written laws; others are transmitted by oral tradition. The common theme of calendar making is the desire to organize units of time to satisfy the needs and preoccupations of society. In addition to serving practical purposes, the process of organization provides a sense, however illusory, of understanding and controlling time itself. Thus calendars serve as a link between mankind and the cosmos. It is little wonder that calendars have held a sacred status and have served as a source of social order and cultural identity. Calendars have provided the basis for planning agricultural, hunting, and migration cycles, for divination and prognostication, and for maintaining cycles of religious and civil events. Whatever their scientific sophistication, calendars must ultimately be judged as social contracts, not as scientific treatises.
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Torch (520) - Laser Lamp (50) - Calculator (186) - Radio (233) - Electronic Gift (93) - Flashing Electronic Gift (63) - Promotional Fan (77) - Digital Gift (56) - Calendar (90) - Sound Box (17) - Theftproof Gear (13) -

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calendar
ID: HP-023598
electrical calendar
ID: HP-022730
electrical calendar
ID: HP-022731
electrical calendar
ID: HP-022742
calendar
ID: HP-022747
electrical calendar
ID: HP-022732
LdClock
ID: HP-022232
FM
ID: HP-022427
When the total purse
ID: HP-022299
perpetual calendar
ID: HP-021251
calendar
ID: HP-021216
calendar
ID: HP-021212
Electronic clock
ID: HP-001419
Chinesse carlendar & clock
ID: HP-001423
Solid electronic clock
ID: HP-001426
Clock
ID: HP-009622
Sail boat clock
ID: HP-001442
Digital calendar
ID: HP-009674
Advertising watch
ID: HP-009675
Clock &10000 year calendar
ID: HP-009664

home prev [1][2][3][4][5]next end[ Totals 90 gifts,and 5 pages ]

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Calendar