Unofficial Holidays
See also: :Category:Unofficial observancesThese are holidays that are not traditionally marked on calendars. These holidays are celebrated by various groups and individuals. Some are designed to promote a cause, others recognize historical events not recognized officially, and others are "funny" holidays, generally intended as humorous distractions and excuses to share laughs among friends.
- Friday the 13th
- April Fools' Day (1 April)
- Bloomsday (16 June based on James Joyce's novel Ulysses)
- Black Friday (The day after Thanksgiving, or any Friday the 13th)
- Buy Nothing Day (The Day after Thanksgiving)
- Christmas Eve (24 December)
- Festivus (23 December)
- First Contact Day (5 April) (The day Vulcans establish first contact with humanity)
- Friendship Day (first Sunday in August)
- GIS Day (The Wednesday during Geography Awareness Week in November)
- Harry Potter Day (July 31)
- International Cannabis Day/Four Twenty (20 April) (counterculture holiday for promotion of marijuana)
- International Dadaism Month (4 February, 1 April, 28 March, 15 July, 2 August, 7 August, 16 August, 26 August, 18 September, 22 September, 1 October, 17 October, 26 October)
- International Talk Like a Pirate Day (19 September)
- Ninja day (5 December)
- Marathon Monday (3rd Monday in April, a sidenote to Patriot's Day)
- Mischief Night (30 October)
- Mole Day (23 October)
- Monkey Day (14 December)
- National Cancer Survivors Day (first Sunday in June)
- National Gorilla Suit Day (31 January)
- National Hug Day (January 21)
- No Pants Day (first Friday of May)
- Pi Day (14 March) or Pi Approximation Day (22 July)
- Robert Burns Day/Burns Night (January 25)
- Super Bowl Sunday (Day of the National Football League championship)
- S.A.D. -- (Single's Awareness Day) (14 February)
- Star Wars Day (May 4)
- Sweetest Day (3rd Saturday in October)
- Tax Freedom Day
- Towel Day (25 May) (a tribute to the late Douglas Adams)
- World Party Day, (April 3) (opposite of World War)
Read more about this topic: Lists Of Holidays