January 1
- Euro Day
- First Foot Day
- New Year’s Day
- International Public Domain Day
- Polar Bear Plunge Day
- World Day of Peace
January 2
January 3
January 4
January 5
January 6
January 7
January 8
January 9
January 10
January 11
January 12
January 13
January 14
January 15
January 16
- International Hot and Spicy Food Day
- World Snow Day – Third Sunday in January
- World Religion Day – Third Sunday in January
January 17
January 18
January 19
January 20
January 21
January 22
January 23
January 24
January 25
January 26
January 27
- International Day of Commemoration in Memory of the Victims of the Holocaust
- World Breast Pumping Day
- Vietnam Peace Day
January 28
January 29
January 30
- World Leprosy Day – Last Sunday in January
January 31