National CleanUp Day is an annual event that takes place on the third Saturday of September in which volunteers across the United States come together to clean up litter and waste in their communities and surrounding areas.
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National CleanUp Day is celebrated annually on the third Saturday in September.
| 2024 | September 21 | Saturday |
| 2025 | September 20 | Saturday |
| 2026 | September 19 | Saturday |
| 2027 | September 18 | Saturday |
| 2028 | September 16 | Saturday |
| 2029 | September 15 | Saturday |
| 2030 | September 21 | Saturday |
| 2031 | September 20 | Saturday |
| 2032 | September 18 | Saturday |
| 2033 | September 17 | Saturday |
| 2034 | September 16 | Saturday |
| 2035 | September 15 | Saturday |
