If you walk to the placard of an empty plot, it'll tell you exact times and current phase. It's unlikely that the cycle is going to change and especially not unannounced. The cycle just silently ran in the background while the winner 0 bug was being fixed.

Next housing lottery starts 19th August 15:00 UTC. Given that data point you can extrapolate all further times.

I also hope they'll add the actual phase end times to the timer menu which is the place I expect to find times in.