Changing photo period during weekends?

[MarkoD]

one of my pet peeves is looking at a dark tank.

i have my timers set to start turning on at noon on weekdays and be fully on by the time i get home at 4pm.

but on weekends i still wake up at 7 or 8a.m. and am home most of the day.

would it be ok to have the lights on longer during weekends and then back to normal on weekdays?