Most kids are in child care over 10 hours per day so it's not that uncommon to be in there that kind of hours.
If a person works 8-5 or 5:30 the hours add up like this.
If I have to be at work, at my desk, ready to get on the phone or take a call or start a meeting at 8am I need to be there before 8am. I need a few minutes to get parked, get inside, go through getting to my seat, maybe stop by the bathroom, and get a drink. So I need to be at my place of employment by 7:40, just in case traffic is bad I plan on 7:30
Say it's a 20 minute drive from child care to work parking lot. That means I have to leave kiddo, walk out the door and be in my car by 7:10. So we plan on being at child care by 6:55. Kiddo checked in at 7am.
Then you work, do stuff til lunch then take your break. Go back to work and hopefully that conference call you've planned all week is over by 5 so you can get out of the building and off to pick up kiddo. Call goes over by 10 minutes, then you have to straighten up your office, put up confidential materials, etc...you are actually in your car by 5:30. Drive to pick up kiddo and the traffic is pretty heavy since you left a few minutes late. Get to child care at 5:55. Kiddo out at 6pm.
So from 7am-6pm, 11 hours. Normal parent working 8-5 job. Of course it could be cut a few minutes and actually be 10.5 hours. Don't feel bad if your kids are in child care those long hours. They play, sleep, eat, have fun, do crafts, color, get hugs, have more fun, and more. They do get tired at the end of the day, so do the workers, so it's time to go get them when it's time for you to be off. If that is 5 pm then plan on being on the road by 5:15-5:30 every day.
Tell your boss "My child care closes at 6PM and it takes me half an hour to get there. They charge $15 for the first 5 minutes then it's $2 per minute late fee, how would you like to take care of that charge for me? Cash?"