Here is a list of holidays in January from various sources:
- New Years Day (January 1)
- National Hangover Day (January 1)
- Apple Gifting Day (January 1)
- Commitment Day (January 1)
- World Introvert Day (January 2)
- National Buffet Day (January 2)
- National Cream Puff Day (January 2)
- National Personal Trainer Awareness Day (January 2)
- National Science Fiction Day (January 2)
- National Bird Day (January 5)
- Bean Day (January 6)
- Armenian Christmas (January 6)
- National Bobblehead Day (January 7)
- National Tempura Day (January 7)
- National Bubble Bath Day (January 8)
- National Clean Your Desk Day (January 8)
- National English Toffee Day (January 8)
- National Law Enforcement Appreciation Day (January 9)
- National Static Electricity Day (January 9)
- National Clean Off Your Desk Day (January 10)
- National Oysters Rockefeller Day (January 10)
- National Take the Stairs Day (January 11)
- National Milk Day (January 11)
- National Human Trafficking Awareness Day (January 11)
- National Hot Toddy Day (January 11)
- National Vision Board Day (January 12)
- National Marzipan Day (January 12)
- National Rubber Ducky Day (January 13)
- National Sticker Day (January 13)
- National Dress Up Your Pet Day (January 14)
- National Bagel Day (January 15)
- National Hat Day (January 15)
- National Fresh Squeezed Juice Day (January 17)
- National Popcorn Day (January 19)
- National Cheese Lovers Day (January 20)
- National Hugging Day (January 21)
- National Granola Bar Day (January 21)
- National Pie Day (January 23)
- National Handwriting Day (January 23)
- National Peanut Butter Day (January 24)
- National Compliment Day (January 24)
- National Opposite Day (January 25)
- National Irish Coffee Day (January 25)
- National Spouses Day (January 26)
- National Chocolate Cake Day (January 27)
- National Bubble Wrap Appreciation Day (January 30)
- National Croissant Day (January 30)
- National Inspire Your Heart with Art Day (January 31)
Note that some of these holidays are national, while others are international or cultural.
