Danish Holidays - Battle of Dybbol Day
Celebrated on 18 AprilDanish Holidays - Battle of Dybbol Day
Other holidays on 18 April
- International holidays - International Day of Monuments and Historic Sites
- International holidays - World Amateur Radio Day
- Russian Military Glory Day - Battle of the Ice (1242)
- Funny holidays - International Juggler's Day
- Fun Holidays - Pet Owners Independence Day
- Holidays of Ukraine - Foundation Day of the Red Cross Society in Ukraine
- Remembrance Day of the Hung Kings in Vietnam (Gio To Hung Vuong)
- Zimbabwe Holidays - Independence Day
- According to the folk calendar - Fedul Vetrenik
- Transfer of the relics of St. Job, Patriarch of Moscow and All Rus'
- Day of Remembrance of the Holy Martyrs Agathopodus the Deacon and Theodulus the Reader
- Memorial Day of St. Puplius of Egypt
- Memorial Day of St. Theodora of Thessalonica