April 6: Tartan Day
Show off your Scottish heritage, and grab your kilt while you're at it.
April 6: Sorry Charlie Day
This holiday was inspired by Charlie the Tuna—the cartoon mascot for StarKist and the subject of an advertising campaign that ran until the 1980s. In the spots, Charlie purports to have good taste, and wants to be recruited by the company, but is perpetually rejected via a sign on a fish hook that reads, "Sorry, Charlie." (As the narrator explains, they're interested in tuna that tastes good, not tuna with good taste.) The ads spawned a national catchphrase, and this holiday seeks to recognize all those who have lived through rejection and still retain their spunk.
April 7: International Beaver Day
Ferrets aren't the only small mammals we love here at Mental Floss: International Beaver Day will warrant its own party, too.
April 7: National Beer Day
On March 22, 1933, Franklin Roosevelt signed the Cullen–Harrison Act, legalizing the sale of beer (as long as it was 3.2 percent alcohol by weight or less) after many years of Prohibition. The thirsty public had to wait two long weeks before they could legally imbibe again, and on April 7, the law finally went into effect. Beer drinkers around the country rejoiced, and celebrated with a nice cold one, presumably.