Dawn time from veg to flower

I have my grow in my garage which is frequently used by us in the evenings so the dark time needs to be at a time when we are less likely to need things from the garage. This means the dawn time will have to change instead of the dusk time. Is this a big deal?

i would suggest leaving the lights off during your regular cycle and then start them on the new cycle. this should give you what you want without any adverse side effects .... good luck .. PEACE...