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.
Friday. The day before yesterday (WED) was two days after Monday.
Saturday
Five days after Wednesday is Monday. So if Monday is the day after tomorrow, today is Saturday.
today, yesterday, tomorrow
It is not a question. If the question is "What day should you meet your brother?"; the answer is Monday
My reasoning is thus: If as in the question - Yesterdaywas Saturday then: Today would be Sunday so 'the day after tomorow' would be: Tuesday - -(tomorrow being Monday) and: Friday comes 4 days before Tuesday (on the 7 day loop.....Friday...Saturday...Sunday...Monday...Tuesday......and so on in a loop)
Monday
it will be the third day from today (or the day after tomorrow).
Tuesday
Yesterday, today and tomorrow.
Friday
Yesterday