In this episode, Frasier's (Kelsey Grammer) birthday is between Thanksgiving and Christmas. Previously it has been in March.
There is precedent for Frasier (Kelsey Grammer) talking to Eddie (Moose). In Season 4's Ask Me No Questions (1997), Frasier uses him as a sounding board while considering Niles' question.
According to this episode, Frasier was born around the same time as one of Queen Elizabeth's children. Prince Charles was born in 1948, Princess Anne in 1950, Prince Andrew in 1959 and Prince Edward in 1963. (Kelsey Grammar was born in 1955.)