Day 20 April Importance
- 4/20 Day (also known as National Pot Smokers Day, Weed Day or National Weed Day
- Boston Marathon - April 20, 2020 (Third Monday of April)
- Chinese Language Day - April 20, 2020
- International Cli-Fi Day
- Lima Bean Respect Day
- Look a Like Day
- National Cheddar Fries Day
- National Pineapple Upside-Down Cake Day
- National Pot Smokers Day - (Also known as 4/20, Weed Day or National Weed Day)
- Orthodox Easter Monday - April 20, 2020 (movable date)
- Patriot's Day - April 20, 2020 (Massachusetts and Maine) (Third Monday of April)
- UN Chinese Language Day
