World War II started on September 1, 1939, and ended on September 2, 1945. From the current year 2025, the war started about 86 years ago and ended about 80 years ago.
Key Dates of World War II
- Start: September 1, 1939 (Germany invaded Poland)
- End: September 2, 1945 (Japan formally surrendered)
The war lasted for six years and one day, making it one of the deadliest conflicts in history with over 50 million deaths worldwide.
