- Wikipedia: Julian Calendar
Hyperlinked article about the calendar that was introduced by Julius Caesar in 46 B.C.E.
en.wikipedia.org/wiki/Julian_calendar
- The Perpetual Calendar
Article about the process of switching from the Julian to the Gregorian calendar, with a table showing when each nation made the transition.
www.norbyhus.dk/calendar.html
- Julian Calendar
Brief summary of the Julian calendar, imposed by Julius Caesar in 46 B.C. to replace the original 10-month Roman calendar.
scienceworld.wolfram.com/astronomy/JulianCalendar.html
- Synoptical Julian-Gregorian Calendar
Compare the Julian and Gregorian calendars for any date between 1582 and 2100 using this side-by-side reference.
5ko.free.fr/jul-greg.php?e=en
- What is the Julian Calendar?
Explains the workings of the Julian Calendar, used by the Roman Empire after 46 B.C. and by the Catholic Church until the 16th century.
webexhibits.org/calendars/calendar-christian.html#SECTION003100000000000000...
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