Day and Date Calculator

http://blog.livedoor.jp/andrewe/archives/cat_415504.html

Here's something I was playing with over the break. (Thanks to my trusty tester Remco :-))

Day and Date Calculator
You can subtract dates. (The difference between the 2 dates is shown under the "Years, Month, Day" and "Weeks, Day" labels which adjust automatically. Note: The Upper Date must be higher than the Lower Date)



Or calculate dates. (Enter either positive or negative numbers in the textboxes where applicable. The "Calculated Date" label also updates automatically)



Pre-1900 Dates
Notice the lower date from the first image that is shown is Year 100. Dates from Year 100 January 1 until Year 9999 November 30 can be used for both Subtract Dates and Calculate Dates.

Here's a link to download from.