Should I push it or leave it?

This might seem silly but I don't know whether I'm asking too much of him?

My boyfriend works shift work and tonight hes working a close meaning he will finish sometime between 1am and 3am. Being Tuesday its likely to be closer to 1am. But he often drinks with his colleagues after and/or has a smoke when he gets home before going to bed about 4/5am.

Tomorrow I have the day off to take my car to the garage which I have to do at 11am. I want to ask him to get up early (he usually get up about 2pm) to come with me so while the car is being worked on we can wander round, get some food, just do something together. If he doesn't I either will walk home by myself, about hour long walk, or walk around by myself till its ready.

Obviously I want him to get up at 11am and come with me so I can spend time with him. But he probably won't want to get up that early. And will probably stay up super late even tho he knows I want him to come.

Basically I don't know whether to push it? I can keep reminding him and asking or I can leave it be and just walk home by myself? Each time I have brought it up he has sort of snapped at me. Hes been grumpy lately. 🤷‍♀️ but its made me a little scared to push it.