Ignoring the fact that you have not ended a question with the word 'please' which is considered polite to do.....There will be 2/3 Formal nights and the rest will be 'smart casual and above'. You will need a jacket for the Formal tea if you attend. The dress code applies to everyone on the ship after 6pm and I am glad to say that most adhere to this.
Apparently Celebrity changed their dress codes with effect from 1 Aug. There will no longer be any informal nights, just formal and smart casual.
Celebrity have 3 dress codes, formal, informal and smart casual, depending on how many cruise nights you are on the ship, a 14 night cruise is 3-4 formal 4 informal (Men wear)suit/jacket and the rest smart casual, you will have a fantastic time cruised on the summit x2 and other celebrity ships x10 in our favorite cruise line.
Please do not post incorrect information - there is only Formal and Smart Casual and Above now, there are no Informal nights any more.
I say wear what you want...We adhered to the dress code for RCI Caribbean last year. Spent a fortune on tux, evening dress etc for the ladies and guess what?! We were over dressed. The 'smart casual' nights as mentioned below turned out to be people wearing a £100 pair of JEANS and a shirt!!
We've just returned from this cruise. There are 9 'smart casual and above' nights and 3 formal nights. On one of the 'scaa' you have the option to dress in white for a deck party (and many do). On 'scaa' dress as if you were going out for a meal at home. On formal ladies wore long, short and all stops in between with a lot of sparkle! Men wore tux or dark suits. There were the occasional people who didn't make the effort, but they were in the minority.