>>321416481
People don't play videogames at 10-13 o'clock like it is in EU right now, that's when you are at work/school.
But it's primetime SEA hours - 20 o'clock in Japan, for example, which is after both work and dinner but before sleep. That's why TV channels do their primetime during those hours. It's the time when people are most likely to seek out entertainment.

So, it's SEA hours. Not saying that they are doing the shitposting, just saying that "[timezone] hours" refers to when most people from the timezone have freetime.