In my native language, if today is 1st and Sunday and we want to refer to the next Sunday (on 8th) then we may say the "today's eighth day" or just "8th day". For example if you're asking when does the festival begin? Someone may reply: 8th day. Obviously the count 8 includes today. On the other hand if we excluded today then it'd have been the 7th day from today.
Does English have an expression like that? If so today is Sunday and one wants to refer to Tuesday, is it called 2nd day from today or 3rd day from today?