World Singing Day
Celebrated on 21 OctoberWorld Singing Day
Other holidays on 21 October
- Celebration of the Mind Day
- Day of Dagestan Culture and Languages
- World Iodine Deficiency Day
- Cement Day
- Colorful Umbrella Day
- International Day of the Nacho
- Home Movie Day
- International Repair Day
- Sweets Day in the USA (Sweet Day, Sweetest Day)
- Trafalgar Day in the UK
- Apple Day in the UK
- Day of Remembrance for the Victims of World War II in Serbia
- According to the folk calendar - Tryphon and Pelageya
- Memorial Day of St. Taisia of Egypt
- Cathedral of Vyatka Saints
- Memorial Day of Venerable Pelagia of Antioch