Arbor Day Holiday 2024 Washington. Learn about arbor day and its founder, julius sterling morton, and find activities to do. This year’s washington arbor day celebration will be held april 26 starting at 10:30 am at 11 th avenue sw across from the ga building on the capitol campus.

National arbor day falls on friday, april 26th, 2024 (56 days ago) in washington, united states. 137 rows united states 2024 holiday calendar with all major holidays and observances.