Smithsonian Day
September 18
When is Smithsonian Day celebrated in 2022?
Smithsonian Day is observed on September 18 each year.
Observations
| Weekday | Month | Day | Year |
| Sunday | September | 18 | 2022 |
| Monday | September | 18 | 2023 |
| Wednesday | September | 18 | 2024 |
| Thursday | September | 18 | 2025 |
| Friday | September | 18 | 2026 |
