you will have two and i always dress up for both =)) usually carnival does their first formal night your 2nd night onboard the ship...the 2nd night im not too sure about.
Commodor Enchanted Isle of Capri-06.97
Royal Caribbean Sovereign OTS-4.16.07
Carnival Fantasy 4.28.08
Carnival Fantasy 10.27.08
Norwegian Pearl 3.13.11
Carnival Elation 11.14.11
Carnival Ecstasy 5.21.12