When is International Mountain Day in United States?
International Mountain Day falls on Thursday, December 11th, 2025 in United States.
Quick Facts
| This year: | 11 December 2025, Thursday |
|---|---|
| Next year: | 11 December 2026, Friday |
| Last year: | 11 December 2024, Wednesday |
| Type: | UN observance |
Dates for International Mountain Day
| Holiday name | Date | Weekday |
|---|---|---|
| International Mountain Day | December 11, 2025 | Thursday |
| International Mountain Day | December 11, 2026 | Friday |
| International Mountain Day | December 11, 2027 | Saturday |
| International Mountain Day | December 11, 2028 | Monday |
| International Mountain Day | December 11, 2029 | Tuesday |
Other Holidays in December 2025 in United States
December 1, Cyber Monday December 1, World AIDS Day December 1, Rosa Parks Day December 2, International Day for the Abolition of Slavery December 3, International Day of Persons with Disabilities December 5, International Volunteer Day for Economic and Social Development December 5, World Soil Day December 6, St Nicholas Day December 7, Pearl Harbor Remembrance Day December 7, International Civil Aviation Day December 8, Feast of the Immaculate Conception December 9, World Genocide Commemoration Day December 9, International Anti-Corruption Day December 10, Human Rights Day December 11, International Mountain Day December 12, Feast of Our Lady of Guadalupe December 13, National Guard Birthday December 15, Chanukah/Hanukkah (first day) December 15, Bill of Rights Day December 17, Pan American Aviation Day December 17, Wright Brothers Day December 18, International Migrants Day December 18, Arabic Language Day December 20, International Human Solidarity Day December 21, December Solstice December 22, Last Day of Chanukah December 24, Christmas Eve December 25, Christmas Day December 26, Kwanzaa (first day) December 26, Day After Christmas Day December 31, New Year's Eve