World AIDS Vaccine Day
Celebrated on 18 MayWorld AIDS Vaccine Day
Other holidays on 18 May
- International holidays - International Museum Day
- Holidays of Russia - Day of the Baltic Fleet of the Russian Navy
- Funny holidays - Whiplash Day
- Funny holidays - Maybug's birthday
- International holidays - Pink Panther Day
- Day of Remembrance for the Victims of the Deportation of the Peoples of Crimea
- Festival "Night of Museums"
- Kalmyk Tea Day
- Roofer Day in Russia
- World Nordic Walking Day
- Culture Freedom Day
- World Whiskey Day
- Science Day in Ukraine
- Europe Day in Ukraine
- Holidays of Turkmenistan - Day of Revival, Unity and Poetry of Magtymguly
- Holidays of Turkmenistan - Constitution and National Flag Day (Day of Revival and Unity)
- According to the folk calendar - Arina Rassadnitsa, Arina Kapustnitsa
- Astronomy Day
- Memorial Day of the Holy Great Martyr Irene of Macedonia
- Feast of the Icon of the Mother of God “Inexhaustible Chalice”