- Stay-In-Bed Day
- Origami Day
- Picnic Day
- Ask a Stupid Question Day (28 September)
- Towel Day (25 May)
- Friendship Day (first Sunday in August)
- International Talk Like a Pirate Day (19 September)
- Mischief Night (30 October)
- National Hug Day (January 21)
- Pi Day (14 March) or Pi Approximation Day (22 July)
- Buy Nothing Day (November 27–28)
- World Laughter Day (January 11)
- Tolkien Reading Day (March 25)
- Star Wars Day (May 4)
- Teaparty Day
- Tapas Day
- International Sushi Day (June 18)
- Random Acts of Kindness Day (September 1)
- Honesty Day (April 30)
- Paper Airplane Day (May 26)
- Hobbit Day (September 22)
- Geek Pride Day (May 25)
- International Zombie Day (May 29)
- Rock'n Roll Day
- Black-and-White Films Day
- Record Day
- Sunflower Day
- Day of Bakery
- Photography Day
- Watercolour Day
- Pick-A-Flower Day
- Day of Drawing
- Poohsticks Day
- Soup Day
jun 11 2011 ∞
jun 11 2011 +