You don't put the DATES in the command, because the dates are different every year. The command has to indicate the 2nd Sunday in March and the 1st Sunday in November, regardless of what the actual dates are year after year.
On the Swiss calendar, the first day of the week is Monday and the 7th day of the week is Sunday. So, do they have to make their time cange take place on the 7th day of the week, or is their Nortel software based upon the US/Canada calendar?
It takes a little getting-used-to at first, but with calendars printed Monday through Sunday, the weekend REALLY is the week end, and Sunday REALLY is the seventh day.