Today is also...
National Greeting Card Day
Event
U.S. Air Force Academy Day 
International Fun at Work Day 
National One Cent Day 
National Fun Day
National Sourdough Bread Day 
Reading is Funny Day
National Walking DayToday is also part of...
Event
Laugh at Work Week
Earth Month
International Guitar Month
Keep America Beautiful Month
National Card and Letter Writing Month
National Decorating Month
National Food Month
National Grilled Cheese Month
Golden Rule Week
National Humor Month
National Literature Month
National Poetry Month
Couple Appreciation Month