Many people may be worried about homework when participating in CF contests on weekdays, and Chinese users don't have a chance to compete. So, I think it is better to set the time of the contests to weekends.
Spoiler
More contests at weekends
Many people may be worried about homework when participating in CF contests on weekdays, and Chinese users don't have a chance to compete. So, I think it is better to set the time of the contests to weekends.