I made something similar a while ago ( http://www.addedbytes.com/blog/mathematical-anniversaries/ http://www.addedbytes.com/blog/mathematical-anniversaries/ ).

I made something similar a while ago ( http://www.addedbytes.com/blog/mathematical-anniversaries/ http://www.addedbytes.com/blog/mathematical-anniversaries/ ). I never did work out why these things aren't more popular. Might I suggest adding ical?