Hi Suzanne! How exciting that you'll be traveling across the pond to Walt Disney World Resort this summer! Hopefully, my answer gets to you in time. I see you have some crucial Dining Reservations to book, and in my mind, eating is the most important part of any Disney vacation- I hear a Dole Whip calling my name!
  The short answer is you can log into your My Disney Experience Account at 11:00 AM GMT which is equivalent to 6:00 AM EST in Florida.  I'd love to offer you a few suggestions for new dining experiences that have arrived at Walt Disney World this yEAR.  
 First of all is 
Storybook Dining at Artist Point at Disney's Wilderness Lodge. I got to preview the menu this fall, and I promise you that this will be a fun whimsical meal, and is an excellent value on the Disney Dining Plan. Another restaurant that is set to open right before your trip is 
Toledo - Tapas, Steak & Seafood at the brand new Gran Destino Tower at Disney's Coronado Springs Resort. Depending on where you're staying, I think it will be worth your while to eat at this rooftop Spanish style restaurant that is rumored to have fireworks views! Lastly, if you're nostalgic for llumiNations: Reflections of Earth, there's a brand new 
dining package at the Rose & Crown.  
 Good luck making your Advance Dining Reservations, Suzanne!  Stay tuned to the 
Disney Parks Blog for some magical happenings for 2019! 
 Eean