It is my understanting that demolition normally takes place at the top of each hour. The 22nd will be when many houses go up in smoke. I remember this happening on Balmung during the last restart and most houses went up for demo at the same time. I was able to transfer to a poolside in the goblet when that happened. There were quite a few houses in all the wards and housing districts. They'll all be on timer unless you transfer but there will certainly be a lot fewer people at each house.