April 2021 Calendar of Events
- Earth Month: Entire Month of April
- National Environmental Education Week: Monday, April 19th to Friday, April 23rd
- National Park Week: Saturday, April 17th to Sunday, April 25th
- Earth Day: Thursday, April 22nd
- World Health Day: April 8th
- Arches National Park 92nd Anniversary: April 12th
- Hot Springs National Park 100th Anniversary: April 20th
- Channel Islands National Park 83rd Anniversary: April 26th
- Theodore Roosevelt National Park 74th Anniversary: April 28th
