The only reasonable explanation is that you've been transported backward in time

How could it possibly be that all this printed material looks like it was printed recently? Why does it seem there is something too perfect, too consistent, about all the filings? As if it had all been assembled in the past week, not filed and stored away a long time ago.

Of course! You must have been teleported backward in time!

1. You spend your time trying to avoid running into yourself, fearing a time paradox
2. You sneak out of the house to try and find out how far back in time you are
3. You go around and fix the past so everything turns out better for yourself
4. Suddenly the whole thing flashes into your mind, who you are why your here what you must do and a great recipe of lemon cake
5. Try to out stare the clock