The baby was born in the Year of the Monkey and was 11 months old. Chinese New Year for the Year of the Monkey started January 22, 2004. In order for the baby to be 11 months old, this episode, shown in mid-November, must take place after December 22.
This is the first episode of the entire run that is obvious that they have now started shooting the series on the much easier to control "Brooklyn Street", on the Paramount Pictures backlot. Considering that CBS and Paramount are on:off corporate siblings via the CBS and Viacom mergers and de-mergers, this backlot location choice is totally understandable.