September 22 Holidays, events and History 2021.
| Date | Day | Holiday Name | Holiday Type | Country |
| Sep 22 | Wednesday | Harvest Festival Holiday | National Holiday | South Korea |
| 22 Sep | Wednesday | Day after the Mid-Autumn-Festival | Obligatory Holiday | Macau |
| 22 Sep | Wednesday | Independence Day | National holiday | Bulgaria |
| 22 Sep | Wednesday | Mauritius Day | Common local holiday | Switzerland |