Smithsonian Institution Founded – Anniversary by GBTribeNOW | Jul 18, 2017 Calendar When: August 10, 2017 all-day Repeats 2017-08-10T00:00:00-06:00 2017-08-11T00:00:00-06:00 Where: http://www.si.edu/ On 10 August 1846, the Smithsonian Institution was founded in Washington, DC.