Battle of Moscow Day is observed in Russia every December 5, commemorating the pivotal events of the Battle of Moscow during World War II, which occurred from October 2, 1941, to January 7, 1942. This day marks the anniversary of the Soviet counteroffensive that began on December 5, when Soviet troops transitioned from a defensive stance to actively pushing back against Nazi Germany's Operation Typhoon. The successful counteroffensive played a crucial role in driving Nazi forces away from Moscow, ultimately contributing to the defeat of Nazi Germany in 1945. The day is recognized as a day of military honor, reflecting on the sacrifices and achievements of the Soviet army during this significant period in history.