I got my peak OPK at 3:30pm on Boxing Day. The OPK before that, at 12pm was low, and the one after that, at 7pm was high. So all I can say is that my peak was somewhere between 12-7pm.
Normally FF and PreMom put my ovulation date as the day after my peak, so the 27/12.
However. due to temps, FF is now saying my ovulation date was the same day as my peak!
It doesn’t make any sense!