DateDetective 

 

DateDetective deals with calendar type of dates. To deal with the other kind is more difficult :)

DateDetective has two sections:
- "Day Of Week" helps you find out the day of week (Monday, Tuesday ...) of a given date (like your birthday). Its very friendly user interface is self explanatory. Just pick a date and the day of week will immediately be displayed on the screen.
- "Holidays" helps you find out the exact date and day of week of the American holidays and other holidays known or celebrated in USA (like "St. Patrick's Day" or "Cinco de Mayo"). Some holidays have a fixed date, like Christmas, but most of them don't. Easter date, for instance, varies from March 22nd to April 25th. Thanksgiving also varies in date; it's the 4th Thursday of November.

Here are some screenshots: