bp1000
3
Jan 20, 2023,11:13 AM
Take it through several 24 hour periods, moving time forward, slowing at 10pm as the change over happens.
It will likely still be an issue so with the time at 7am, activate the day corrector several times and see if it fixes itself.
I know of a few instances where a 3970 got lazy on the changeover and it can fix with wear and in time.
Unfortunately it would be lucky for the above to fix it, especially if this has been worn a lot recently.
This happened to mine and it was fixed during a service.
The day not moving over could be the result of a correction to the calendar between 5:30pm and 2am in which cause, the only way to fix it would be for the movement to be serviced.