Are there any applications that allow you to enter dates (such as special occasions like b-days, anniverseries, etc...) and can also show how many days it's been since that day.
For example, if you entered Jan 1, 2003 as a special date, it could tell you it's been 36 days or so since that date.
I have a program that I DLed a few years ago called CalDate that works for me well. I'm pretty sure it is freeware. You can e-mail the developer at jb.godillon@wanadoo.fr The program calculates the days between the dates by using the Julian dates.
Countdown as referred to by Clie Luvr is also a good program because you can calculate the time since a date or to a date down to the second.
Date/day counter 
Linear Mode
