April opens with a day of coordinated lying, closes with Earth Day, and pays its taxes somewhere in the middle. It's the full arrival of spring in the northern hemisphere — the first reliable month of warm afternoons, the start of baseball's actual season, and the narrow window where everyone briefly agrees the weather is perfect. Also the month where Easter either shows up or reschedules to March, depending on the moon.
Every day in April
😂 April Fools' Day
👧 International Children's Book Day (International)
🎊 Walk to Work Day
👧 Children's Day (Hong Kong, Taiwan)
🍽️ Cold Food Festival, held on April 4 if it is a leap year (China); and its related observances:
🕊️ Chakri Day, commemorating the establishment of the Chakri dynasty. (Thailand)
🏴 Flag Day (Slovenia)
☸️ Buddha's Birthday, also known as Hana Matsuri, "Flower Festival" (Japan)
✊ Baghdad Liberation Day (Iraqi Kurdistan)
🎊 Day of the Builder (Azerbaijan)
🎊 Juan Santamaría Day, anniversary of his death in the Second Battle of Rivas. (Costa Rica)
👧 Children's Day (Bolivia)
🐣 April 13 (Eastern Orthodox liturgics)
🎊 Ambedkar Jayanti (India)
☀️ Day of the Sun (North Korea)
🎊 Birthday of José de Diego (Puerto Rico, United States)
🗽 Evacuation Day (Syria), celebrates the recognition of the independence of Syria from France in 1946.
🎖️ Army Day (Iran)
🚲 Bicycle Day, a psychedelic holiday
🏛️ 420 (cannabis culture)
🎊 Natale di Roma (Rome)
✈️ Fighter Aviation Day (Brazil)
📚 Canada Book Day (Canada)
🕊️ Armenian Genocide Remembrance Day (Armenia, California, France)
🎊 Anzac Day (Australia, New Zealand, Tonga)
🕊️ Chernobyl disaster related observances: Day of Remembrance of the Chernobyl tragedy (Belarus)
🎊 Day of Russian Parliamentarism (Russia)
🎊 Mujahideen Victory Day (Afghanistan)
🕊️ Day of Remembrance for all Victims of Chemical Warfare (United Nations)
🎖️ Armed Forces Day (Georgia)