Every yearDecember 11
Everything December 11 celebrates
7 national, international, and world observances are on the calendar for December 11 every year, and 1 more lands on it in some years.
| # | Observance | Category | Actions |
|---|---|---|---|
| 01 | International Mountain DayLead | Nature | |
| 02 | National App Day | Tech | |
| 03 | National Have a Bagel Day | Food | |
| 04 | National Salesperson's Day | Celebration | |
| 05 | National Stretching Day | Health | |
| 06 | Official Lost and Found Day | Celebration | |
| 07 | Holiday Food Drive for Needy Animals Day | Community |
These are set by a rule rather than a fixed date, so they only land on December 11 in some years.
Green Monday — 2028 and 2034
Born on December 11
Historic figures
- Naguib Mahfouz1911–2006Egyptian author, playwright, and screenwriter, Nobel Prize laureate
- Aleksandr Solzhenitsyn1918–2008Russian novelist, historian, and short story writer
- Hector Berlioz1803–1869French composer, conductor, and critic
- Robert Koch1843–1910German microbiologist and physician, Nobel Prize laureate
- Max Born1882–1970German physicist and mathematician, Nobel Prize laureate
- Alfred de Musset1810–1857French dramatist, poet, and novelist
- Pranab Mukherjee1935–2020Indian journalist and politician, 13th President of India
- Osho1931–1990Indian mystic
- Pope Leo X1475–1521Head of the Catholic Church from 1513 to 1521
- Jean Marais1913–1998French actor and director
Celebrities & public figures
- John Kerryb. 1943American lieutenant
- Hailee Steinfeldb. 1996American actress
- Viswanathan Anandb. 1969Indian chess player
- Rita Morenob. 1931Puerto Rican actress
- Rey Mysteriob. 1974American wrestler
- Jermaine Jacksonb. 1954American singer-songwriter
- Colleen Hooverb. 1979American author
- Leighton Bainesb. 1984English footballer
- Macky Sallb. 1961Senegalese engineer and politician
- Mo'Niqueb. 1967American comedian
Birth dates from Wikidata; names link to Wikipedia.
This page covers December 11 in any year. For one year in particular — the weekday, and which moveable observances landed on it — see December 11, 2026.
Today Celebrates tracks daily national, international and world observances all year.