BLUF: Your OCS date is negotiable with your OR, take time to get your life and body in order if you need to.
To address both of these, your application should have had a section for your earliest available date for OCS. They won’t always honor that, but you can use that as leverage when working with your OR. I put on my application that my earliest available date was March of 2023 (I wanted to go during the summer so I wouldn’t have to PT outside in the winter) but got orders for the 08JAN23 class. I know of people who were able to move their OCS dates both sooner and later, but they were fleet applicants.
All of that being said, going in the winter wasn’t as horrible as I thought since some days it was so cold that outdoor PT and procedures were secured, plus working out in the cold made it easier for me to work out since the weather was already cooling my body vs sweating a butt ton in the summer. I know people from warmer climates struggled to PT in the cold because their lungs weren’t used to taking in such cold air, but I was pretty used to it from running outside back home in the winter. I also look back and think, “fuck if I went in March I’d only just now be graduating or starting BDOC/OOD P1” so I’m glad I started earlier and got OCS out of the way. I was just mentally and physically ready to go when I got my orders for January, so moving up from my anticipated ship date of March wasn’t a terribly big deal. But if you get a ship date that isn’t ideal for you for whatever reason, by all means work with your OR to negotiate a date that works for you.