Lists of Holidays - Unofficial Holidays

Unofficial Holidays

These 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)