Raymond Barone's birthday is not explicitly mentioned in the television show "Everybody Loves Raymond." The character's birthday is not a significant plot point in the series.
There were several different ones. A couple of them are from movies -- one from Il Postino, and another from Cinema Paradiso (my apologies if I've misspelled)
Raymond Chandler was born on July 23, 1888.
Raymond Ochoa was born on October 12, 2001.
Raymond Poulidor was born on April 15, 1936.
Raymond Kopa was born on October 13, 1931.
Raymond Briggs was born on January 18, 1934.
Raymond Garneau was born on January 3, 1935.
Raymond Pellegrin was born on January 1, 1925.
Raymond Chow was born on January 1, 1929.
Raymond Gutierrez was born on January 21, 1984.
Raymond Lambert was born on October 18, 1914.
Paula Raymond was born on November 23, 1924.