Howdy!
There is a difference between having a separate mobile site and having a dynamically served site. If your site is actually dynamically served you should be fine to leave your mobile content up until early next year.
If your site has a separate mobile site it will usually appear as a different URL like, "m.yoursite.com" or something similar. There are a few cases where this will be detrimental if it's not set up correctly, but for the most part as long as your site has mobile-friendly content I think you should be fine.
Reach back with any questions!
Lydia
