10,000 Year Calendar
Choose a month and year and get an online calendar for any year 1 to 10,000 A.D. with historical facts and/or moon information about any date you select.

Birthdate Calculator
Calculates birthdate from year, month, and date of death. A helpful tool for genealogists trying to determine birthdate from wills, death records, and tombstone inscriptions.

Birth Year From Census
Explains how to calculate a person's birthyear from census information, taking into account the census enumeration date.

Calendar:
Humanity's Epic Struggle to Determine a True and Accurate Year [br]David Ewing Duncan takes us on an extraordinary journey through man's reckoning of time, ranging from the earliest calendars to the atomic clocks of today.[/br]

Calendar Conversions
This page allows you to covert dates among the Julian, Gregorian, Jewish, and French Republican calendars.

Calendar FAQ
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.

Calendar Fun Facts
An interesting list of facts relating to calendars, time, and dates. An excerpt from Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year by David Ewing Duncan.

Calendars and Their History
Reprinted from the Explanatory Supplement to the Astronomical Almanac

The Date of Easter
Information Leaflet No. 57, from the Royal Observatory Greenwich, London.

Dates for Genealogists
A summary of Old Style and New Style dates and the change to the Gregorian calendar as it relates to genealogy, by Mike Spathaky.

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