It is becoming a nightmare. It used to be easy, a few clocks to change, but now......
Because of that, you might find it useful to do what we do at my house, a system adopted originally from the practices by the owners of Sandringham in your own country, although much expanded now.
There is one simple rule: we never change any time shown by a clock; after all, who changes the time shown by a sundial? Little by little over the years, due to daylight saving time, power outages, cats, mishandling, and other reasons, of course, that means that time varies from room to room, but the minimum effort required to pay attention is more than made up for twice a year, when we avoice the biannual dance the rest of you go thru: very little effort is required to remember that the clock on the nightstand is 1h09m fast right now (in a few weeks, only 9m fast), etc. In addition to being an opportunity for calm reflection on our own surroundings, a habit lost in the modern world by all of us rushing around, it's a nice living memory of our recent life: some of our clox record a power outage here a coupla years ago during which we saw a deer on our block -- I live in a fairly urban area of Chicago -- and one of them, bought in Italy three summers ago, still shows Italian Summer Time.
(This computer, oddly enough, just sets itself once a week to U.S. Naval bservatory time; Macintoshes appear to come bundled with that, and check it weekly against the standard: I'm on cable, so it does what it does.)
Towards a simpler life, Bill Thayer 41N53 87W38 col cuore a 42N59.5 12E42.4 alt.313m http://www.ukans.edu/history/index/europe/ancient_rome/I/home.html
