No reason to rag on the guy, it's a legitimate question. I tried to take a week after API, but it was just my luck that a Primary class started the week immediately following API graduation. There is NO wait for USMC SNFOs, unlike everywhere else for anyone else, so you've got a 50/50 chance of having a week off (Primary classes start every 2 weeks).
A new class will check in on Oct 3, and every 2 weeks thereafter. See how your graduation date lies within that before even thinking about asking for leave. If you manage to get lucky, more power to ya, but don't get your hopes up.