Which dates are formal nights on costa deliziosa

Will be on the Costa Deliziosa Oct. 21-Nov. 5. Does anyone know which are the formal nights and if there are any other theme nights in the MDR

The recommended dress for the MDR will be annouced in the daily program "TODAY", it will state something like casual / leisure, formal / gala.

Possible theme evenings could be Whites (all or nearly all in white), Italian (red, white and green).

Will be on the Costa Deliziosa Oct. 21-Nov. 5. Does anyone know which are the formal nights and if there are any other theme nights in the MDR

I'm guessing over two weeks there will be at least 4 "Gala" nights. As GMT said "White Night" and "Italian Night" also probably "50s", "Country" "Latin" "80s"