Defender of the Fatherland Day is a holiday observed in Russia, Tajikistan, Kyrgyzstan, Ukraine, Belarus and several other former republics of the Soviet Union. It is celebrated on February 23.
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. It was originally known as Red Army Day.
Consequently, in colloquial usage, the holiday is often referred to as Men's Day.