Friday. The day before yesterday (WED) was two days after Monday.
If Monday is in two days, that means today is Saturday. Therefore, yesterday would be Friday.
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.
Wednesday.
Tuesday and Wednesday.
saturday
When you say next Monday on a Friday, it means in three days. There are two full days between Friday and Monday. The weekend, Saturday and Sunday is between Friday and Monday.
To solve the riddle, we start from "the day after the day after tomorrow," which is two days from today. If that day is four days before Monday, then two days from today is Sunday (since four days before Monday is Thursday). Therefore, today is Friday.
monday
Starting from Monday, two days after is Wednesday. The day immediately after Wednesday is Thursday, and two days after Thursday is Saturday. Finally, three days after Saturday is Tuesday. Therefore, the answer is Tuesday.
Saturday
St. Valentine's Day is 51 days after Christmas Day. That's seven weeks and two days. Two days after Saturday is Monday.