I will be travelling on the Dawn from Miami. Does the ship stay on Eastern time for the entire cruise? We will be travelling to the Eastern Caribbean (Tortola, St Thomas, etc)

I believe it will during Standard Time, as the Dawn will sail from Eastern Standard Time to Atlantic Standard Time.
During Daylight Savings, Eastern Daylight Time is the same as Atlantic Standard Time. So, depending upon when your cruise sails, you might and might not need to reset your clocks.
Never-the-less, the Freestyle Daily will inform you when the ship changes times.

Hi justjan!

When you go to the eastern caribbean from Miami it's always Eastern Standard time. I know it for sure because I cruised there in April - also on the Dawn. It was great!!!

Greetings to you