the problem is that we have winter here, so there is one hour change
According to your map, right now here is 4:37 pm. In New York there is 10:37am... So 6hrs difference...
And after writing this post, on the forum clock there is also 10:37 a.m.
So if we want to start at 23:30 polish time it will be 17:30 on the forum clock. So please, calculate it by yourself - according to the clock on the forum