Not a date to be celebrated, but to be observed, strangely I have not heard any mention of this on any radio or television station today. It was arguably the start of the greatest event or series of events in modern history. It took 6 years and 1 day to complete the total defeat of the Axis powers and free millions from oppression. Sadly, it did not free the world from oppression, which I guess will continue until the end of time on Earth.

http://www.dw.de/marking-the-75th-anniversary-of-the-outbreak-of-world-war-ii/a-17891943