April 23: Talk Like Shakespeare Day
We have of late, but wherefore we know not, lost all our mirth. What a perfect day to get it back! In honor of the Bard’s birthday, drop some thous and thees, master iambic pentameter, and cast people away by exclaiming “get thee to a nunnery!” Talk Like Shakespeare Day is the one time of year you can express yourself in rhyming couplets; wethinks thou oughtest useth the opportunity.
April 23: World Book Night
On Shakespeare's birthday, passionate volunteers hand out books in the U.S., UK, Ireland, and Germany.
April 24: National Hairball Awareness Day
Don't become a statistic.
April 25: World Penguin Day
Seriously, all the animal holidays are fine with us.