The Communists of all countries unite!

First celebrated in 1919 the holiday marks the date in 1918 during the Russian Civil War when the first mass draft into the Red Army occurred in Petrograd and Moscow on 17 February. In January 1919 it was decided to combine the celebration that day with the anniversary of the publication of the decree on the establishment of the Red Army of 18 February 1918. In 1919 February 17 fell on Monday; so it was decided to move the holiday to the nearest Sunday – 23 February. Since then it stayed that day. It was originally known as Red Army Day. In 1923 it was officially named the Day of the Red Army and the Navy.
In 1949, it was renamed Soviet Army and Navy Day
https://www.youtube.com/watch?v=meuKQmJRrb4
https://www.youtube.com/watch?v=NRNofGKSRkM