Ted's birthday is in January (he says he's eight months older than Matt Bryan Jr. after he says that he was born in September).
Lou says that Matt Bryan is 44 years old, Bradford Dillman was actually 42 at the time. Further his son Matt Bryan Jr., played by John Rubinstein was only 16 years younger than Dillman. A bit of a big deal was made out of the age of each character in relation to Mary. In real life Mary Tyler Moore was 36 at the time.
We find out Mary's house was designed by Frank Reich.