Everyone above -- and the MS CM -- is correct. However, since you describe yourself as a newbie, an explanation of "day-by-day" might be in order.
You can book your home resort 11 months to the day from your check-OUT date. So if you're looking to book the entire trip, the MS CM was correct.
However, Carol is also correct -- ain't happening!
So, you will want to book day-by-day. On the 28th, book the your arrival night. On the 29th, call back and book the second night. On the 30th, call back and book the third night. Etc, etc, etc.
Using that stragegy, you are able to book each day precisely at 11 months. That's not usually necessary, but it avoids a ton of heartache, stress, and waitlist adventures for really busy times.