Prague Astronomical Clock, photographed on our visit in spring 2002
In most parts of Canada, early Sunday morning our clocks will be adjusted back to regular time (remember "spring forward, fall back"). It used to be at the end of October but that was adjusted to follow the US changes a few years ago. I always think this messing around with time changes idiotic, expensive, unsafe and unhealthy. The history and politics are rather interesting though, here and here. Do you have to change clocks twice a year where you are?