- April 1 – April Fools' Day
- April 2 – Passover starts
- April 5 – Qingming Festival (Mainland China, Taiwan, Hong Kong, Macau)
- April 7 – Health day
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- April 8 – Easter Sunday (Both Eastern and Western Christianity)
- April 20 – 420 (cannabis culture) National Marijuana Appreciation Day
- April 22 – Earth Day
- April 30 – Walpurgisnacht (Satanic New Year)
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