"during October 2009" vs. "in October 2009"

Which is more correct?

"For about four weeks, in October 2009, we [...]."

"For about four weeks, during October 2009, we [...]."

Or, is there something else that would be even better? Both sound slightly awkward.

Thanks!

isn't it IN 2009

For the month of October 2009, we...

In October 2009, we ...

I like it with during, because during has more detail than in. Writing is also visual art, and it is musical. The word during ads interest. The comma is unnecessary, though.

"For about four weeks during October 2009, we [...]"