[Baertram]

Just a wild guess as I do not know if this is possible:
Maybe your clock was not synced and the timestamps saved to the SavedVariables were then unsynced and 7hours off.

If e.g. any addon uses ZOs or lua functions to get the date and time they rely on the os.date or os.time functions and if your client's clock is wrong, it could be an issue then (I think).

The addons write the data to your disc into the SavedVariables files, probably with a timestamp number format (time from initial time counting until today).
If all of them are off the same timerange then it would make sense that they got saved wrong.