Happy iCal Day

For the enlightened of you using Macs, I realized today is iCal day. Check out the dock icon for iCal:

The icon looks exactly the same when open and closed, today (iCal changes its icon to display the current date when open) I did a minimal amount of digging and the reason that July 17 was chosen as the display date is just related to the release date of the first Mac OS X that included iCal (maybe 10.2?). Nothing majorly exciting about the date selection for the icon, but the icon being identical on and off today is cool... to me.