If you can't ditch work and head out to the ballpark today, do not despair. Some of the Usual Suspects tout Monday as National Fun at Work Day (one goes so far as to proclaim it International Fun at Work Day).
Of course, we're a little skeptical when 'fun' and 'work' are used in the same sentence -- and having too much fun at work may well be hazardous to your long- and short-term employment prospects. The Blog of Days can not be responsible for the consequences of your celebrating Fun at Work Day.
Steve Jobs, Steve Wozniak, and Ronald Wayne founded Apple on April 1, 1976, and that was certainly no joke.
And there is an odd coincidence of Air Force anniversaries on April 1: