Red Army Dayor Day of Soviet Army and Navy in the formerSoviet Union, also held in various former Soviet republics:

Defender of the Fatherland Day(Russia), Defender of the Fatherland and Armed Forces day(Belarus), Armed Forces Day (Tajikistan)(Tajikistan)

Originally Red Army Day, this observance now honors the armed forces in Russia, Belarus, and Tajikistan.
Established on February 23, 1918 to commemorate the founding of the Red Army, this holiday evolved into Defender of the Fatherland Day in Russia. It honors military personnel and veterans with parades, wreath-laying ceremonies at war memorials, and concerts. In Belarus and Tajikistan, similar Armed Forces Day events include military reviews and public festivities. The day highlights national defense achievements and pays tribute to those who served. Families celebrate with veterans, while state leaders deliver speeches on patriotism and duty.
Red Army Day Soviet Union Defender of the Fatherland Day Russia Defender of the Fatherland and Armed Forces day Belarus Armed Forces Day (Tajikistan) Tajikistan

Defender of the Fatherland Day(Russia)

A Russian public holiday celebrating the nation’s armed forces and their role in history.
Defender of the Fatherland Day, observed on February 23, traces back to the first mass draft into the Red Army in 1918. Modern celebrations feature military parades in Moscow, ceremonies at the Tomb of the Unknown Soldier, and concerts honoring veterans. Citizens offer thanks to service members and participate in patriotic events across the country. The day is also informally called Men’s Day, as it recognizes men’s contributions to society. Schools and businesses may host special programs acknowledging military history and courage.
Defender of the Fatherland Day Russia

Defender of the Fatherland and Armed Forces day(Belarus)

Belarus’s holiday honoring its military, descended from the Soviet Red Army traditions.
On February 23, Belarus celebrates its Armed Forces Day, commemorating soldiers and veterans with parades in Minsk and regional ceremonies. The President and defense officials lay wreaths at monuments dedicated to war heroes. Military bands perform public concerts, and families visit veterans to express gratitude. Educational events in schools highlight Belarus’s military history and the importance of national defense. The holiday reinforces civic pride and respect for those serving in uniform.
Defender of the Fatherland and Armed Forces day Belarus