It's supposed to be sometime between thanksgiving and Christmas but there's still leaves on the trees in some scenes.
There is an inside joke about Treat Williams being unable to memorize his lines. During one of the ATX cast reunions, fellow castmate Stephanie Niznik who played Nina said that due to frequent script changes, Treat's lines were sometimes taped to the front of her shirt to help him appear poised during their dialogue. But she thought it was funny that she had her own lines memorized but often looked clueless on camera.
There is an inside joke near the 13 min mark. Edna is speaking about how cold it is. Dr Brown says he remembers one winter in Calgary... The show's pilot was shot in Calgary during the coldest winter in over 200 years with temperatures reaching 40 below zero.