International holidays - European Brothers and Sisters Day
Celebrated on 31 MayInternational holidays - European Brothers and Sisters Day
Other holidays on 31 May
- Welder Day in Russia
- European Neighbors Day
- Holidays of Russia - Day of the Russian Bar
- UN Holidays - World No Tobacco Day
- International holidays - World Blondes Day
- International holidays - World Parrot Day
- International holidays - World Inequality Day
- Fun Celebrations - Cycling Birthday
- Russian Holidays - Psychotherapist Day
- Russian holidays - Day of formation of juvenile affairs units in the system of internal affairs bodies of the Russian Federation
- International holidays - International Flight Attendant Appreciation Day
- International holidays - Web Designer Day
- Holidays of India - Day of fasting and spiritual practices "Pandava Nirjala Ekadashi" (Pandava Nirjala Ekadashi)
- Day of Remembrance for Victims of Political Repression and Famine in Kazakhstan
- According to the folk calendar - Fedot Ovsyanik, Seven Virgins
- Memorial Day of the Holy Fathers of the Seven Ecumenical Councils
- Memorial Day of St. Macarius of Altai