What is the meaning of campus sacrifice and cultural sacrifice in Japanese animation?

Cultural Festival refers to the festival activities similar to literary festivals that appear on the campus of Japanese animation. Students set up their own stalls, make snacks and sell them on the spot, or sell things that they or their families don't need or are boring. What they sell is very cheap. At the same time, the annual cultural festival will be very lively. In addition, some students can dress up their houses (usually classrooms), and some dress up as haunted houses, creating all kinds of terrible scenes in them to scare people deliberately. The haunted house is a traditional program that spread in Japan a long time ago, mainly because adults want to exercise their children's courage and cultivate their brave spirit. In addition, there are some interesting activities, such as dressing up as a divination room and divining for others. There is no uniform time limit for the school culture festival in Japanese animation, but each school has its own time limit, so it is held on the last Saturday and Sunday in March, and also in May ... anyway, it is held in June.