I am looking for a history of various different calenders including
Julian Gregorian etc and the reasons for the changes as well as Judaic
and other calenders

Dear oze,

This website should cover all your needs. It offers the history,
backgrounds, and descriptions for the following important calendar
systems:

- Ancient Egyptian Calendar 
- Ancient Roman Calendar 
- Julian Calendar 
- Gregorian Calendar 
- Persian Calendar 
- Jewish Calendar 
- Islamic Calendar 
- Mayan Calendar 
- French Revolutionary Calendar

In addition, there is extensive information on the basic principles,
problems and historical development of calendar and date calculation.
To learn more, please follow this link:
http://www.ortelius.de/kalender/idx_en.php
(Several Calendars, by Holger Oertel)


This website also features information on the Julian, Gregorian, and
Islamic calendar systems, on calendar calculation and calendar reform,
but in addition, there is also information on the history of the
traditional Chinese and modern Indian calendars:
http://astro.nmsu.edu/~lhuber/leaphist.html
(New Mexico State University: Calendars, by L. E. Doggett)


Some descriptions of individual calendaric systems:

The Aztec Calendar, Wikipedia Online Encyclopedia
http://en2.wikipedia.org/wiki/Aztec_calendar

The Japanese Calendar, its History and its System, by the Japanese National Diet
http://www.ndl.go.jp/koyomi/e/

The Ancient Greek Calendars, by Karl T. Hagen
http://www.polysyllabic.com/Greek.html


Search terms used:
calendars history julian gregorian hebrew
://www.google.de/search?hl=de&ie=UTF-8&oe=UTF-8&newwindow=1&q=calendars+history+julian+gregorian+hebrew&meta=
"indian calendar" "chinese calendar" history
://www.google.de/search?q=%22indian+calendar%22+%22chinese+calendar%22+history&hl=de&lr=&ie=UTF-8&oe=UTF-8&newwindow=1&start=0&sa=N
"history of the japanese calendar"
://www.google.de/search?hl=de&ie=UTF-8&oe=UTF-8&newwindow=1&q=%22history+of+the+japanese+calendar%22&meta=

Hope this is what you were looking for!
Very best regards,
Scriptor

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Request for Answer Clarification by oze-ga on 14 Dec 2003 04:30 PST

Dear Scritor,

Thank you very much for your effort, could you perhaps add some
simplified and concise site/s as the one given although comprehsive,
is quite complicated. Anymore on Catholic Orthodox and jewish 
calenders would be appreciated if possible

Thanks

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Clarification of Answer by scriptor-ga on 14 Dec 2003 05:36 PST

Dear oze,

I hope that these articles will fit with your needs:


Greek Orthodox Calendar
http://savalas.tv/religion/aboutcalendar.htm
(Source: Tavalas.tv)

The Greek Orthodox Calendar
http://www.geocities.com/cogrv/Calendario.html
(Source: Comunidad Ortodoxa Griega de Venezuela)


From the website "Calendars through the Ages":

Jewish Calendar
http://webexhibits.org/calendars/calendar-jewish.html

Julian Calendar
http://webexhibits.org/calendars/calendar-christian.html#SECTION00310000000000000000

Ancient Roman Calendar
http://webexhibits.org/calendars/calendar-roman.html

Ancient Egyptian Calendar
http://webexhibits.org/calendars/calendar-ancient.html#egypt

Ancient Babylonian Calendar
http://webexhibits.org/calendars/calendar-ancient.html#bab

Traditional Chinese Calendar
http://webexhibits.org/calendars/calendar-chinese.html

Indian Calendar
http://webexhibits.org/calendars/calendar-indian.html

Islamic Calendar
http://webexhibits.org/calendars/calendar-islamic.html

French Revolutionary Calendar
http://webexhibits.org/calendars/calendar-french.html

Ancient Mayan Calendar
http://webexhibits.org/calendars/calendar-mayan.html

Various other Calendars
http://webexhibits.org/calendars/calendar-other.html

Source for the sites above: "Calendars through the Ages"
http://webexhibits.org/calendars/


Gregorian Calendar
http://en2.wikipedia.org/wiki/Gregorian_Calendar
(Source: Wikipedia Online Encyclopedia)

Gregorian Calendar, by Paul V. Hartman
http://www.naciente.com/essay58.htm
(Source: Naciente.com)


Very best regards,
Scriptor

Thank you very much, excellent work