A time for people to be assholes and get away with it

Males and females that instantly don shorts and/or flip flops as soon as it's April 1st, regardless of the temperature. These people will then complain for the entire day about how cold it is and demand that April be warmer.
Most often spotted at the mall.

The first of April every year. According to Lisa Simpson, this is when the Christians changed thier calender to January, and the pagans kept it at the first of April. The people who did not change were called april fools, and thier day was sabotaged by Christians for fun.

an overrated prank day that happens on April 1 of every year

A prank or practical joke done during the month of April, followed by the person saying "April Fools!"

the perfect time for urban dictionary.com to go rural

The first day of April, when you can fake your sexuality or put tape under someone's mouse.