This is from the MICS 7.0 manual:
AutoTime&Date
You can program the Automatic Time&Date feature to enable the Norstar system to automatically update the time and date after a power failure.
Whenever the clock is out of sync by more than two minutes, as a result of a power failure or a loss of power, the first incoming call updates the clock automatically after two rings.
Note: CLASS trunks are required for this feature to work. Consult your customer service representative to determine if you have CLASS trunks.
[COLOR=red yellow]Tips - The hour falls back one hour on the last Sunday of October at 2:00 am. It advances one hour on the first Sunday of April at 2:00 am. This function should only be programmed by your installer.
In regions where daylight savings time does not apply, make sure this setting is changed to N (No).
This feature also allows automatic changing between North American daylight savings and standard time. The Automatic Time and Date feature automatically overrides any manually-programmed changes to the time and date.[/color]
Note: The year is not included with the time and date information and must be programmed manually if the current year differs from the network time.
Press CHANGE to choose Y or N
Granted, this problem will only be around for 4 weeks total every year. It seems as though Nortel is going the route of Microsoft, and only applying the "fix" in the "latest" (and greatest?) version... Microsoft does not have a fix for XP if you are using SP1 or base, nor does it have a fix for Windows 2000 (or lower). But, in these cases, at least third-party utilities were available...
Sorry for the rant...