Last month I was able to make my WOC Dining reservation for Wine Country Trattoria 2 weeks prior to my birthday and was able to secure a dining time for the first show. (I made my reservation on July 5th and my birthday was on the 20th which meant I made my reservation 15 days before my birthday)
The earlier you are the better chances of getting an earlier time frame for the reservation. It really depends on the following for the World of Color Dining Packages:
1.) The date you plan on doing the dinner is open. This means that all dining times aren't booked out yet.
2.) What Restaurant you want to have it at. (It can be either at Ariel's Grotto or Wine Country Trattoria) they will ask if you prefrence a place
3.) Which showing you want to attend (currently it's for the 9 and 1015 performances and each has their own timeframe for the dinner. Refer to the first post on this topic for the info) they will ask for which showing it will be for and will give you the time frames.
When I called, I said It didn't matter which restaurant it was at as long as I had the first show and was able to make the reservation for Wine Country for the first show at 6:30pm that day.