Just leave it bro, no problem at all. Your lights will just come on/ shut off an hour later. I used to fuck around with it to keep my light schedule ( on @ 9pm off @9am) now I just let it ride to 10pm-10am.
Yes it’s fine, however if your old time was more convenient just turn off your lights tonight at 730 so they get an extra hour of dark tonight not light
LOL same thing happened to my GF! she checks on the plants every night when the light comes on cause I am at work. She was freaking out when the lights did not pop on! But shit, it took me a second to realize what was going on LOL!