hello! i'm a first-time DCL cruiser and have a question! from the "My DCL" website, it looks like you can do some things online like pre-register and book excursions. it looks like i can start my bookings 75 days out. does anyone know what time? does the webpage open up exactly at 12midnight on that day you are allowed to do online booking? Or is it 7am (EST)? or something? thanks for your help!