It almost feels strange that there isn't a DST-related thread (at least not that I can see), and the DST ends in the EU (and some other European countries which follow the EU rules for DST) -- in less than half an hour.
By now I already know that, the moment the hour strikes (one second after 01:59:59 BST), my GPW-1000 will change its time back to the "winter time" (01:00:00 UTC).
This is different from the "normal" radio-controlled watches, which, at least in Europe, after the hour strikes and the time changes, will stay on the "wrong" time for about one minute, then they are scheduled to start an auto sync and upon a successful sync they set themselves to the correct time.
My assumption is that, with GPW-1000, the information about the time change was not picked up from the radio signal (it is being transmitted in the radio signal for one hour just before the change) nor with the GPS signal (I don't think GPS signal even carries the information about DST), so, it will have some calendar with DST change rules built in itself?
Now, my question is, what will happen if these rules ever change? I know a debate about this is always going on, and it might very well happen in future. What happens then, if and when the time isn't being changed any more? Will my watch (wrongly) change the time, then will auto sync with the radio signal and change itself back to the correct time?
Also, it seems, that my watch after landing in a new EU time zone and after GPS-time-zone-sync might have the DST setting wrong so will I have to either (just after the GPS time zone sync) change the DST manually or to wait until the radio signal sync at night? (there is no manual radio sync, only manual GPS sync afaik, and this doesn't help with the DST setting as far as I understand)
So it seems that we GPW-1000 owners should lobby against any possible DST changes -- no, the rules must stay as they are! :D