Access online calendars, birthdate calculators, genealogy calendar programs, date converters, today in history, and instructions on proper date formats for genealogy research.
Learn how to accurately read and convert dates in old documents and records, including common calendar conversions, feast days and other special dates, quaker style dates, accurate date recording and other date issues of importance to genealogists.
Between 1793 and 1805 a special calendar was in use in France and areas under French rule. This French Republican or Revolutionary calendar consisted of ten day weeks (decades) and twelve months of thirty days. Learn how to convert dates from the French Republican Calendar into the standard calendar format.
Charts to help you calculate a person's birthyear from census information, taking into account the census enumeration date.
An overview of the Christian, Hebrew, and Islamic calendars in common use, as well as the French Revolutionary calendar, the Maya calendar, and the Chinese calendar. In ASCII text format.
reprinted from the
Explanatory Supplement to the Astronomical Almanac The history of the seven day week and the naming of the days.
From the online encyclopedia of Judaism, this is an excellent overview of the Jewish calendar.
A history of the months and the meanings of their names.
Explore chronologies of worldwide royal reigns and dynasties, arranged geographically.
An explanation of Roman numerals along with hints to aid you in reading them.
The Library of Congress presents a wonderful essay each day on historical events of today's date, including links to additional information on the American Memory site. Includes archives of all past essays.
