7 people are arguing what the current day of the week might be. Each states what he believes to know:

1. The day after tomorrow is Wednesday.
2. No, Wednesday is today.
3. You are both wrong, Wednesday is tomorrow.
4. Today is not Monday, nor Tuesday or Wednesday.
5. I think yesterday was Thursday.
6. No, yesterday was Tuesday.
7. Whatever. All I know is that yesterday was not Saturday.

All of them, except one, is wrong. What day is it it?