Are talking you talking about reserving a Deeded Ownership week? or Points? They are different.
I'll address WEEKS because I think you meant weeks.
Weeks SHOULD BE done online and only after 9:00 EST...actually 9:00:00:02 (you know what I mean----one second past 9:00 am EST!)
Make sure you have the EXACT date 12 months prior to the date you can legally book.
There are tools at the MVC website to tell you when that day is (Resources > Helpful Tools > When Can I Reserve).
Enter the check-in day you want and it'll tell you the first day at 9:00am that you can reserve it.
The way to accomplish that is to sit at your computer, watching the clock (it's official Denver or Greenwich time,
which is deadly accurate and your reference).
About a week before do a trial run to familiarize yourself with the process.
Then about 10 minutes prior to your booking time, do another trial run.....Go to the page for booking (MVC website, "Book My Week").
When you look at your resort chart, it won't be seen as available yet, but at 9:00:00:01 the check-in date boxes will pop up as available,
but only if you REFRESH the chart just after 9:00am as described above. Refreshing is the key.
If you watch the clock and the chart and don't refresh, it'll stay blank and no availability boxes will show UNTIL YOU REFRESH.
So, having refreshed exactly at 9:00:01 (I wait an extra second or two only), you immediately see the boxes for Fri, Sat Sun pop up.
Click on what you want, and ENTER/SUBMIT, whatever it says!----it's ridiculously EASY, but yet stressful due to the importance.
But before 9:00 in your trial run, practice REFRESHING every 20 seconds or so, which updates the availability,
so up until 9:00 it'll NOT be available. Be sitting on READY TO REFRESH as the time mark approaches.
For 12 month reservations (assuming only one week to book) it SHOULD BE DONE ONLINE ONLY!!!!!!!!!!!!!!
Calling in for a single week will often be fruitless, as the weeks are all gone by the time you get through to an agent.
Most of the reason is that everybody else has already done it online.
Online is fastest because you avoid all the phone call pre-booking questionnaire which accompanies the call.
By the time they get around to looking for availability, your desired week is potentially gone.
This usually applies only to popular weeks, though, so if you want a non-holiday or moderately popular week, you can call, but why bother?
Do it online, and get used to doing it online. Even NOW you can do a dozen online trial runs and get the process down pat.
FYI, if on the other hand you have TWO weeks you want to book consecutively or concurrently at 13 months,
you MUST do it by calling only; you can't do it online.
For Destination Points reservations I just call.
Despite our having about 18,000 potential enrolled points if we deposit weeks for Points exchange,
we usually don't use them much. Maybe only for 2-3 weeks annually, or individual days.
Good luck.