Monday.
SUNDAY
The day Tuesday comes after Monday. The day Tuesday comes after Monday.
monday
Sunday that is, one is the season that comes before and the other is the day that comes before.
A day before Tuesday is Monday. A day after Tuesday is Wednesday.
Okay so say it's Monday and you want to know when is midnight on Monday and noon on Monday and how do they relate.Midnight on Monday comes 12 hours BEFORE Noon on Monday.Midnight on Tuesday comes 12 hours after Noon on Monday.The point being, midnight is the first hour of each new day.
Sunday is the first day of the week, not Monday.
monday
Today is Sunday. Monday is the day before two days after today (the day before tomorrow). Monday is the day before Tuesday. Two days after today is Tuesday.
monday
Friday. The day before yesterday (WED) was two days after Monday.