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#1
W7 advances clock multiple times after DST
On the 25th of March we switched to DST here in Denmark and Windows correctly advanced the clock 1 hour at 2 am like it was supposed to. Then today it added another hour to the clock so I had to set it back to the correct time manually.
This weird behaviour started happening 2-3 years ago after a Windows update to the DST settings. When we go into DST it will set the clock on the correct date, then a few days later it will add another hour, and then after a few days more it will set the clock again. When we return to normal time (CET) in the fall it's the same issue - it will set the time on the right date, and then take another hour of a few days later. Each time it happens 2-3 times before it stops changing the time for no reason.
It only does this around the DST forward/backwards dates. Once I reset the clock manually it sticks. The time zone is set right, the clock is right otherwise, it's set to auto-adjust time from time.windows.com.
There are two event log entries whenever it changes the time, but in this case this part is different:
Code:Previous Time: 2018-04-05T08:09:41.281252600Z New Time: 2018-04-05T07:09:39.000000000ZThe rest of the entries are normal.Code:Previous Time: 2018-04-05T07:09:39.000000000Z New Time: 2018-04-05T07:09:39.000000000Z
There are two entries each time it changes the clock and it "blames" the Windows Time Service for setting the time each time, but I cannot find any entries that mention the DST. There's only one entry for time sync in the task scheduler (unless it's buried in the wrong place) and that's set to run each Friday - so not in the middle of the week.
This is Windows 7 Home SP1 (US/UK English Windows with Danish Locale settings). According to Windows Update it's fully updated.