Juliansk tid

Vad är juliansk tid?

2. The Christian Calendar
-------------------------

The "Christian calendar" is the term traditionally used to designate
the calendar commonly in use, although its connection with
Christianity is highly debatable.

The Christian calendar has years of 365 or 366 days. It is divided into
12 months that have no relationship to the motion of the moon. In
parallel with this system, the concept of "weeks" groups the days in
sets of 7.

Two main versions of the Christian calendar have existed in recent
times: The Julian calendar and the Gregorian calendar. The difference
between them lies in the way they approximate the length of the
tropical year and their rules for calculating Easter.

2.1. What is the Julian calendar?
---------------------------------

The Julian calendar was introduced by Julius Caesar in 45 BC. It was
in common use until the 1500s, when countries started changing to the
Gregorian calendar (section 2.2). However, some countries (for
example, Greece and Russia) used it into the 1900s, and the Orthodox
church in Russia still uses it, as do some other Orthodox churches.

In the Julian calendar, the tropical year is approximated as 365 1/4
days = 365.25 days. This gives an error of 1 day in approximately 128
years.

The approximation 365 1/4 is achieved by having 1 leap year every 4
years.

Delphis kalender är gregoriansk kalender.

Här kan du ladda ner EsbDates vilken innehåller funktion för
beräkning av juliansk kalender.
http://programmersheaven.com/zone2/cat58/14168.htm

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TI

Glömde att översätta till svenska.
Allt detta och mera finns i esbdates
på ovanstående adress

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TI