Spanish Constitution Day (Dia de la Constitucion)
Celebrated on 6 DecemberSpanish Constitution Day (Dia de la Constitucion)
Other holidays on 6 December
- Santa Claus's Birthday (Sinterklaas)
- Day of formation of drug control units of the Ministry of Internal Affairs of the Russian Federation
- Day of formation of the prosecutor's office of the Republic of Kazakhstan
- Microwave Oven Day
- Mitten Tree Day
- Lazy Day
- Saint Nicholas Day among Western Christians (Catholics)
- According to the folk calendar - Mitrofan's Day
- Day of Defenders of Dubrovnik in Croatia (Dan dubrovackih branitelja)
- Workers' Day of the Ministry of Communications and Information Technologies of Azerbaijan
- Finnish Independence Day(Suomen itsenaisyyspaiva)
- Memorial Day of the Righteous Grand Duke Alexander Nevsky
- Memorial Day of the Holy Martyr Theodore of Antioch
- Memorial Day of St. Gregory of Akraganti
- Memorial Day of St. Amphilochius of Iconium