For some reason, people sometimes have a proclivity to write dates like this: “February of 1990.”
This flummoxes me, because the correct way is actually easier: February 1990. And you’d never say “February of 1990” aloud, would you?
I mean, no one says, “Oh yes, I got that cat sweater during the Christmas of 2011.” Unless you’re working on your Abe Lincoln impression, maybe, trying to sound old-timey?
Perhaps it’s an effort to aggrandize your writing. Well, stop it! Stop it, I say! Leave “of” out of your dates. They’re happier that way.
November 2013. Done.