No....always stay on ship's time, Valor leaves out of Miami, time will always be on EST. So, the ship will leave at 6pm EST, which is 5pm Belize time. Always remember this so you don't get left behind, which in Belize City would not be too fun. Also, you will be tendering to Belize City, and although the ship leaves at 6pm, the last tender from the pier back to the ship is 5:30 ( 4:30 Belize local time).
I will be happy to give some more info on Roatan, but I need to get ready to get up early and back to work tomorrow ( the worst part of the end of vacation!) so I will post more about Roatan and Belize tomorrow. Both great ports, actually liked them better than Grand Cayman and Cozumel- and don't get me wrong, I liked those places a lot too!
Post your questions and I will answer them when I have a chance tomorrow.
Carnival Conquest - 4/12/09 (W. Caribbean)
Carnival Liberty 02/12/06 ( W. Carib.)
Carnival Valor 2/06/05 ( W. Carib.)
Carnival Pride 4/27/02 ( W. Carib.)
Sitmar Fairsea 4/ 1983 ( Mex. Riviera - I was just a little kid!!)