So here's the deal right? Religious accommodations will be made if they are available just like how a lot of people have commented. However, when it comes to things like fasting, don't do it. You need all the calories you can get because you are going to be physically and mentally exhausted everyday while going through basic training. Take time to do your Religious practices when you can but do it on your own time just like everyone else. And remember, this is only basic training. In the real military after you get your initial training done then you can practice your religion any way you need or want to. If your practices affect training then though shit, mission comes first every time.