Ah ha, here you are. Thought I might find you here, so I decided to wander on over.
I've read through your last posts here, and all I can tell you girl is that I remember the 'From 0-4 Kid Stages.' Jesus, talk about NO time for yourself whatsoever... and then when you do get a moment to yourself, it's a battle to decide whether you want to go do something, clean without holding a kid on your hip, or lay down and SLEEP!!
With your kids at this stage (and the others here are right, it doesn't last forever), your personal time requires a bit more thought and planning. If you get on your H about working less hours or coming home earlier, I'm sure he's going to be in your face over it, hm? You think to yourself, well, that's not fair, why do I ALWAYS have the kids... I never get a break!!
All I can say is if you wait for the 'break' to show up on its own, you're going to be waiting a long time. It's not fair, and it pisses me off that it isn't fair too, but that and a quarter won't even get you a cup of coffee.
So if you want a Saturday afternoon, plan it in advance. Tell your H that you are doing x, y, z on Saturday and you would like to leave the house by a certain time. You need to know if he can be home by then, and if not, what time will he be home so you can tell the babysitter when he'll be there to relieve her. This way, you are not backing him into a corner, but you are making it clear to him that you will be gone and you expect some kind of commitment from him.
And if you want to go out next Wednesday night at 6, ask your husband if he can be home so you can leave by then. If he says no, then ask him what night he can be home at 6 so you can get out of the house.
If you have a class you want to take that is regularly scheduled, talk with him about it in advance and see what the two of you can come up with so you can leave on time.