Can i lose my job because of this?

I work at little ceasars, i just started about 2 weeks ago, and I got a call from the school board that i got accepted for a student post for 8 weeks during the summer from 8:30 am to 4:30 pm, and I will have to lower my availibity at little ceasars to make room for this job. My question is if I lower my availibity to only (friday 6-close) (saturday any)

(monday-thursday 6-9) (sunday any-10) can i lose my job because of it, and should i explain them why my availibity is going down instead of up during summer break?Can i lose my job because of this?
I would say no. I would just go and talk to an manger and let them know what's going on with your availability and why. You are still able to work some pretty good hours and if they are willing to work with you then that would be great. But I say stay honest about it and it will make your life a whole lot easier.Can i lose my job because of this?
I wouldn't think so because it looks like you are still willing to work during the busy hours. All you can do is try it and see. And if you have to choose pick the one that makes you happy.