which one is correct?" i work on Sunday " or "i work Sunday"
There is a line in Desperate housewives S1E1,

Carlos: Hey, I need to talk to you

John: Cool. Sure.

(Carlos smiles at him)

Carlos: You were working Tuesday, right?
—— why it does not use preposition before Tuesday?

Question

which one is correct?" i work on Sunday " or "i work Sunday"
There is a line in Desperate housewives S1E1,

Carlos: Hey, I need to talk to you

John: Cool. Sure.

(Carlos smiles at him)

Carlos: You were working Tuesday, right? 
—— why it does not use preposition before Tuesday?

Answer

I guess technically, they mean the same thing. However, the first sentence sort of implies to me that this person works every sunday, while the second sentence in the second sentence this person is just talking about the upcoming sunday. If you were to say, "I work Sundays", this would imply again, every sunday.

Answer

Either using "on" or omitting it in this case is all right.

Answer

是比较口语化和生活化的用法，不用过于纠结。