I have a simple command in my .bash_profile to list events which occurred on this date in history. Today it shows absolutely nothing. For anyone interested, the command is: alias today='cat /usr/share/calendar/calendar.* | grep `date +"%m/%d"`'
On most days it will show something like this:
01/28 First ski tow, Woodstock VT, 1914
01/28 Space Shuttle Challenger (51-L) explodes 74 seconds after liftoff
01/28* Tu bi-Shevat
01/28 Jimi Hendrix headlines Madison Square Garden, 1970