Daily Holidays and Observance
1 - April Fool's Day. 
3 - Don't Go to Work Unless it's Fun Day
5 - National Dandelion Day
6 - Hostess Twinkie Day. 
7 - World Health Day
10 - Golfer's Day
12 - Grilled Cheese Sandwich Day. 
13 - Plant Appreciation Day
Thomas Jefferson Day
15 - Boston Marathon. 
Tax Day
16 - National Wear Your Pajamas to Work Day
17 - National Haiku Poetry Day
18 - Take Action for Libraries Day. 
20 - 4/20 Day (also known as National Pot Smokers Day, Weed Day or National Weed Day. 
Record Store Day
22 - April Showers Day 
Earth Day
23- First Day of Passover
Talk Like Shakespeare Day
24 - Administrative Professional's Day. 
26 - Audubon Day
Arbor Day
30 - National Mr. Potato Head Day. 
Walpurgis Night
Monthly/Weekly Holidays and Observance
Arab American Heritage Month
Children and Nature Awareness Month
D.E.A.R Drop Everything and Read Month 
Earth Month
Jazz Appreciation Month
Keep America Beautiful Month
National Kite Month. 
Scottish-American Heritage Month
Administrative Professional's Week - April 21-27, 2024
Astronomy Week (Spring) - April 14-20, 2024. 
Gathering of Nations PowWow - April 25-27, 2024
Just Pray No! Worldwide Weekend of Prayer and Fasting - April 6-7, 2024
National Cherry Blossom Festival (Washington D.C.) - March 20 - April 14, 2024. 
National Library Week - April 7-13, 2024
National Park Week - April 20-28 2024 (Entrance fees are waived at all National Parks on April 20, 2024)
Passover (also known as Pesach) - Evening of April 22 - Evening of April 30, 2024
The Masters Tournament - April 11-14, 2024. 
Open the Excel spreadsheet to view new materials added every month.
Some of the images used throughtout this guide were selected from Google images.