Mood, Backwards.

I'd like to know how people are doing mood / making their header backwards (I have only seen it in /b/, no where else, not unlike fortune. The entire header is backwards, and mood (when not backwards) appears after the date (not after the name) and when it is backwards, appears at the end of the line. Anyone know?

OP here, kinda weird seeing this 2,5 years after I posted.

I can report that I still don't know how to flip the header, but stopped caring after I had sex with a girl.

Have fun virgins.