Thursday, November 06, 2008

About calendars -- A US Navy astronomical guide

This is a great non-religious resource to learn all about calendars.
clipped from aa.usno.navy.mil

Introduction to Calendars
Astronomical Applications Dept.

A calendar is a system of organizing units of time for the purpose of
reckoning time over extended periods.

There are six

principal calendars
in current use. These are the Gregorian, Hebrew,
Islamic, Indian, Chinese, and Julian Calendars. These calendars replicate
astronomical cycles according to fixed rules. The data and information on
our web site are limited to the astronomical issues for these calendars.

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