Memorial Day of the Hieromartyr Theopemtos, Bishop of Nicomedia, and the Martyr Theon
Celebrated on 18 JanuaryMemorial Day of the Hieromartyr Theopemtos, Bishop of Nicomedia, and the Martyr Theon
Other holidays on 18 January
- Orthodox holidays - Eve of the Epiphany (Epiphany Christmas Eve)
- Holidays of the Slavs - Intra (Patron of Snakes)
- Holidays of Russia - Birthday of children's television in Russia
- Russian Holidays - Day of Breaking the Siege of Leningrad
- Russian Holidays - Day of the Russian Air Force High Command
- Funny holidays - Snowman Day
- Funny Holidays - Day of Holiday Waiting
- According to the folk calendar - Epiphany Eve, Hungry Evening
- Funny holidays - Lighthouse Lighting Day
- Night of Raghaib among Muslims (Laylat al-Raghaib)
- Memorial Day of Venerable Synclitia of Alexandria
- Memorial Day of Venerable Apollinaria
- Memorial Day of St. Gregory of Akrita