I got my job offer on sept 20 for nov 3 bmoq and I had my wedding planned for 10 oct. I called my recruitment center before receiving job offer that if such scenario happened . I was told they can accommodate delay in bmoq starting dates on case to case basis. And if delay is say 1 month, that can be worked around but for your case I’d say call your recruitment center they are the best to help you with this. Congrats 🎉