For cruises with one formal night, the formal night is scheduled for the second or third evening of the cruise, with schedules permitting.  For cruises with two formal nights, the first formal night is scheduled for the second or third evening of the cruise; the second formal night is scheduled for the second or third evening prior to the end of the cruise, with schedules permitting. 

1-day cruise: no formal nights   

2-day cruise: one formal night   

3-day cruise: one formal night   

4-day cruise: one formal night   

5-day cruise: one formal night   

6-day cruise: two formal nights  

7-day cruise: two formal nights  

8-day cruise: two formal nights                  

9-day cruise: two formal nights 

10-day cruise: two formal nights

11-day cruise: two formal nights

12-day cruise: two formal nights

13-day cruise: two formal nights

14-day cruise: two formal nights

16-day cruise: two formal nights

17-day cruise: two formal nights