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Viking 1 Mars Lander 54th Landing Observation Anniversary

Nationwide USA

First USA spacecraft to successfully land on another planet commemorated today for its accomplishment 54 years ago; originally scheduled for July 4, landing was delayed until this day in 1976 due to rough landing site.

International Moon Day (Annual)

Global / Inter-Global

Celebrating the 1st people walking on the Moon / another celestial body – International Moon Day has been a recognized / endorsed declaration by the United Nations since 2022.