Greek Armed Forces Day
Celebrated on 21 NovemberGreek Armed Forces Day
Other holidays on 21 November
- World Hello Day
- World Television Day
- Tax Worker Day of the Russian Federation
- Accountant Day in Russia
- No Music Day
- According to the folk calendar - Michaelmas Day
- Day of Dignity and Freedom in Ukraine
- General Peace Treaty Day in Bosnia and Herzegovina (Dayton Peace Agreement Day)
- The holiday of Zervana-Akarana in Zoroastrianism
- Cathedral of the Archangel Michael and other ethereal Heavenly Powers