It would slow down your overall length of time till harvest by longer than if you would have had the time not messed with

It will slowly revert back to vegetative growth and that might take a couple weeks to a month and growth will crawly during this period, my advice is to just leave it at 12/12 and start a new cycle enjoy what you get from this and know next time to leave it at 24/0 longer

on another note, I believe you will be quite suprised and satisfied with your results if you retain your 12/12 schedule until harvest

best of luck~!:rastasmoke: