WinDates Calendar App For Windows 2015-11-18
I have been doing a little work on my "computer junk" around here lately, including installing an XP box in a VM. I wanted to have my calendaring application on this VM and for some reason didn't have the serial number in my zip file where I keep the setup program. The app I use is called WinDates and it is free. If you click on the link you'll find the serial number from the developer.
In fact, just in case the developer ever decides to drop his web site...