It’s what you get, from midnight to 11:59pm, and how you fill it is entirely up to you. Sure, you have commitments, but those are commitments you made, and whether or not you fulfill them. Entirely up to you.
Eight hours of sleep would be nice. Probably eight hours at work, Monday through Friday. Though, currently, it’s often more like nine. Leaving you with around seven to make something else happen.
What do those seven look like? Family? Enrichment? Mindless entertainment? Joyful hobbies, or needless toil? All options that you get to choose.