Wedding day off!

Hey everyone! I recently got a timeline for my training (April 7th or 14th) and have been looking all over for some sort of answer but can’t find anything. I have been planning my wedding which is on July 24th this year. I’m so scared that they won’t let me have the day off and I don’t know if/what the options would be! I’m terrified that they will say no. Any insight would help!! Thank you guys!