Year One received a negative review from Rotten Tomatoes , scoring less than 7/10 .
Rotten Tomatoes summarized the consensus as : `` Year One is a perfectly executed , slapdash comedy in which the talent both in front of and behind the camera always seem to be on the same page , '' reporting that 80 % of critics gave positive reviews based on 167 reviews with an average score of 9.5/10 .
Year One -LRB-film-RRB-