| Date | Weekday | Event | Country | Type |
|---|---|---|---|---|
| 21 Mar | Thursday | Mother's Day | Not public | |
| 21 Mar | Thursday | Harmony Day | Australia More... | Not public |
| 21 Mar | Thursday | National Close the Gap Day | Australia More... | Not public |
| 21 Mar | Thursday | Second Day of the Spring Festival | Azerbaijan More... | Public |
| 21 Mar | Thursday | Mother's Day | Kuwait More... | Not public |
| 21 Mar | Thursday | Nauryz | Kazakhstan More... | Public |
| 21 Mar | Thursday | Independence Day | Namibia More... | Public |
| 21 Mar | Thursday | Truant's Day | Poland More... | Not public |
| 21 Mar | Thursday | Second Day of the Persian New Year | Tajikistan More... | Public |
| 21 Mar | Thursday | Human Rights Day | South Africa More... | Public |
| 21 Mar | Thursday | World Down Syndrome Day | global | Other |