Spreadsheet Day is Today

A correspondent reports that today is spreadsheet day. " ... in honour of the date that VisiCalc was first shipped, way back in 1979. ... "   I used to teach Visicalc back around that time, to some very amazed and appreciative accountant types. It was the first application that empowered the end-user, and caused organizations to buy PCs wildly , calling them for procurement purposes:  'calculators'. The rest is history.  There is even a site that celebrates spreadsheets.   With some history and silliness.