report back: This is only working if you use Sierra back and forward with Windows., If you don't use Sierra for "say' a week and only use Windows, your Windows time will be incorrect. To fix this issue, you need to login to Sierra then restart and your Windows time will be corrected.
So, I think the best way is regedit in Windows. Time will always be corrected even if U don't use Sierra for a long time.
Hey loganMac, thanks for reporting this.
I haven't been able to test this on Sierra, but I don't understand what you're saying.
Your Windows time will be correct for a few days, but after a week, it will be incorrect?
Are you sure the timezone in Windows is set correctly? Maybe Windows' internet time synchronisation kicks in after a week,
and sets the time to the wrong value?