The Germans observe neither, even though a case can be mase that, at least West Germany, was also liberated from the NAZI tyranny just as it was from the occupied countries in 1944. Most countries have more national holidays than Americans. The Austrians for example celebrate 17 holidays. Some countries have more. These events include patriotic and religious holidays as well as a wide variety of special hoidays.
Most countries celebrte a national date.
In America it is of course the July 4 which was the day independence was declared. The Portuguese celebrate the end of a dictaorship on April 25. The Belgian monarch swears allegiance to the Constitution on July 21. The French national day marks the fall of the Bastille, a derelict but forboding prison. The important Christian holidays like Easter and Christnmas are widely observed in Europe and North America.