| International Day to End Obstetric Fistula | |  |
| Labor Day / May Day | | |
| Constitution Day | | |
| World Turtle Day | | |
| National Lucky Penny Day | | |
| National Taffy Day | | |
| Vlach’s National Day (for Vlach community) | | |
| Pentecost Eve | | |
| Culture and Literacy Day | | |
| The Battle of Pichincha | | |
| Independence Day | | |
| National Aviation Maintenance Technician Day | | |
| Brother’s Day | | |
| National Scavenger Hunt Day | | |
| National Escargot Day | | |
| Pentecost / Whit Sunday | | |
| Commonwealth Day | | |
| Buddha's Birthday | | |
| Carpet Day | | |
| Dniester Day | | |
| Saints Cyril and Methodius' Day | | |
| Cultural Workers and Folk Artists Day | | |
| International Tiara Day | | |
| National Asparagus Day | | |
| National Day/May 1810 Revolution | | |
| Independence Day | | |
| Liberation and Resistance Day | | |
| Sing Out Day | | |
| Towel Day | | |
| National Missing Children's Day | | |
| National Wine Day | | |
| National Tap Dance Day | | |
| National Brown-Bag It Day | | |
| Spring Bank Holiday | | |
| Whit Monday | | |
| Day off for Commonwealth Day | | |
| Labor Day / May Day observed | | |
| Memorial Day | | |
| Jefferson Davis' Birthday | | |
| Day following Buddha's Birthday | | |
| Late May Bank Holiday | | |
| Africa Day | | |
| Geek Pride Day | | |
| Italian Beef Week | | |
| Independence Day | | |
| National Sorry Day | | |
| World Lindy Hop Day | | |
| National Blueberry Cheesecake Day | | |
| Day of Arafat | | |
| Sacrifice Feast Eve | | |
| Mother's Day | | |
| National Paper Airplane Day | | |
| World Dracula Day | | |
| Sun Screen Day | | |
| National Cellophane Tape Day | | |
| National Grape Popsicle Day | | |
| National Senior Health & Fitness Day | | |
| National Flip Flop Day | | |
| Eid al-Adha | | |
| Mother's Day | | |
| Tabaski | | |
| Children's Day | | |
| Republic Day | | |
| Hamburger Day | | |
| Derg Downfall Day | | |
| National Brisket Day | | |
| Eid al-Adha holiday | | |
| Menstrual Hygiene Day | | |
| Amnesty International Day | | |
| International Day of United Nations Peacekeepers | | |
| Put a Pillow on Your Fridge Day | | |
| National Paperclip Day | | |
| National Coq Au Vin Day | | |
| National Heat Awareness Day | | |
| National Heroes Day | | |
| Bermuda Day | | |
| Eid al-Adha holiday | | |
| National Biscuit Day | | |
| International Everest Day | | |
| Learn About Composting Day | | |
| Statehood Day | | |
| Anguilla Day | | |
| Day of the Canary Islands | | |
| National Creativity Day | | |
| National Water a Flower Day | | |
| National Hole In My Bucket Day | | |
| National Mint Julep Day | | |
| Loomis Day | | |
| Mother's Day | | |
| Indian Arrival Day | | |
| Eid al-Adha holiday | | |
| Harvest Festival | | |
