"Olympics" is a religious festival in ancient Greece. It is an ancestor worship activity held in Olympia, ancient Greece, which is held every four years. It usually opens at the first full moon of the summer solstice in the northern hemisphere, and this tradition has continued to this day.
The sports competition in ancestor worship activities is called "Olympia Competition". During the Renaissance, people began to call "Olympia" the "Ancient Olympic Games" when studying ancient Greek culture.
Because other cultural activities such as academic discussion, poetry reading and art exhibition were held during the ancient Olympic Games, people called the whole activity including Olympia "Olympics". In order to distinguish it from modern times, it is also called "Ancient Olympic Games".