I'm not an authority on the matter but personally I think that IS a recent enough viewing to base a first round bracket decision on. I know there's been instances where I've watched a movie for a bracket and not got around to writing it up in a verdict until a month or two later. In that time I didn't feel like I had forgotten the essence of the experience or anything that would prevent me from making a fair judgement. Every experience is different though, so that part is really your call. Personally I'd be okay with it.
Just my 2 cents, not a decision.