How many Forma/ semi formal nights?

[DisneyLove2015]

On a 7 night cruise, how many formal/semi formal nights are there? Working on packing now and don't want to over or under pack! Thanks.

 

[lklgoodman]

One formal, one semi. Wish I were packing for a cruise now, have fun!!

 

[Marc D]

We dress up for formal night but know that the dress code is not enforced. Most times, you cannot tell the semi-formal night from the dress casual nights. You could omit a semi-formal kit without a problem.