I make zero accommodations for Muslim students. I also make zero accommodations for Jewish, Christian, Buddhist, Pagan, Hindu etc. Your religion is your personal business and it should stay your personal business. If my lecture / lab / test runs through your observance time you have two choices: take 10 minutes and keep quiet about it, or leave the room. If it's a test you don't get back in. If it's a lab you may miss something important, like how to handle dangerous chemicals. It would be very ironic if your prayers to your God resulted in meeting Him an hour later because you missed something important.
Tolerance and accommodation work both ways. I simply ask that all observant students show equal accommodation for the rest of the class who are quite happy with a 2:30 start time and don't want to rearrange their day because one person prefers 3:30. My reading of the afternoon prayer schedule, for example, says the time is not fixed: "... till the sun is still bright and enough daylight remains for a person to travel 6 miles". The sun is up until at least 5 in the winter, and 6 miles takes 20 minutes (10 on the highway that runs past campus).
Also, remember on the application form, when the school pointedly did NOT ask any questions about race, gender, color, religion, disabilities, heritage etc.? There's a reason: because the answers are irrelevant to the programs (and schedules) we offer.
one student asked for leave for some religious activity
one student asked for leave for some sports activity
one student asked for leave for some social activity
one student asked for leave for some political activity
How are these questions any different?