What is the timezone for the count ?
Some people said it's GMT+3 (Moscow time).
The forum, by default, uses GMT+0; So if that's what is set for you, the next day is set at 21:00.
I talked to other users and it is not exactly GMT +3, because for some already around 19:00 forum time, counts posts for the next day. It probably depends individually for each user. It is possible that it depends on time each of us registered.
Nah. That's not correct and it certainly not about the time of your registration. This campaign next counting work with the Moscow time GMT +3 as said by TryNinja.