The announcement was made today, so it should go into effect tomorrow. The OP has been updated as well.
it seems that it already affects today for the 5 posts because i already made 7 posts but i check my account on yobit but it just credits for 5 posts not 7
Maybe, but there is also possibility that some of the posts are counted for 7th November and some for 8th November.
I just realize that on forum we still have 7th, but in YoBit dashboard posts are counted for 8th November. It looks like there is few hours difference. My post from 20:50 is counted for the next day.
Do anyone know what UTC time is starting new day in YoBit stats?