Calendars & Dates » Calculators & Converters

Kirchenkalender.com - Feiertage im deutschen Kirchenjahr von 900 bis heute / Holidays in the German church year from 900 to today

This is an interactive German church calendar. Select the year and it will tell you one what days various feast days occurred. Sometimes events in church records are stated by the feast day (or number of Sundays after a feast day). This website will help determine the exact calendar date.

Parallax View - Date-and-Duration Calculator

Adds or subtracts a duration from a Gregorian base date to return a new date. Durations may be any combination of days, weeks, months, and years. A special calendar control makes selections of the base date easy.

Parallax View - Date-Subtraction Calculator

Subtracts two Gregorian dates and returns the number of intervening days. A special calendar control makes selections of the dates easy.

Rosetta Calendar - A Calendar Conversion Service

Scott Lee's free on-line service for converting to/from dates in Gregorian, Julian, French republican and Jewish calendars.

The Gregorian Conversion | Polysyllabic

Background information from A History of the Western Calendar.

Tom Nunamaker's Census Age Calculator

For UK census years.