Hi Joanne!
Thank you for visiting the Moms Panel!
All advance dining reservations, and dining event reservations can be made up to 180 days in advance - and it is recommended that you make your reservations as soon as you are able to, when the 180 days window opens, as many restaurants become booked up very early.
All dining reservations can be made
online, or by calling (US number) 001-407 939 3463.
Dolphins in Depth at Epcot can also be booked 180 days ahead of time, and I would also recommend booking a special event such as this as soon as you can. The number to call to book this is (US number) 001-407-939-8687.
If you need to call either of these numbers while you are at Walt Disney World Resort, just omit the first three digits (001).
If you have any other questions about dining, or making reservations, or any other planning questions please come back and ask me - I would be very happy to help you plan your first magical vacation to Walt Disney World!