😀 Good Day. I'm not trying to be funny but I have never heard the term Day Suit.. Sorry, I live a sheltered life. LOL
Mexico cruises are pretty simple. Wear what you would if you were going out to a nice restuarant for dinner. A jacket would be nice but now a days Princess seems to look the other way. Just please no shorts at dinner Lunch in the dining room is casual.
On the other hand if you love dressing up as we do skys the limit.
Have fun it's a vacation..