1921 – Allen was born in New York City on St. Stephen’s Day which falls on the 26th of December.
1942 – Attended Arizona State Teachers’ college in Tempe. He had his radio gig on station KOY in Phoenix, Arizona after he left the school.
1945 – Worked as an announcer for KFAC in Los Angeles.
1946 – Worked as an announcer for Mutual Broadcasting System.
1953 – Worked as a host at a local late-night New York talk-variety TV program.
1954 – Hosted the tv show The Tonight Show.
1955 – Played the role of Benny Goodman in the movie The Benny Goodman Story.
1956 – He had a sunday evening show while still hosting the The Tonight Show.
1963 – Wrote the music and lyrics for the musical play "Sophie".
1977-1981 – Creator and later became the host of the new television show Meeting Of Minds.
1982 – Wrote the music, lyrics and a book for the musical "Seymour Glick is Alive but Sick". Won $1000 bet with Frankie Laine by writing fifty songs per day for one week.
1993 – He was a supporter of world government and became part of the Board of Advisers of the World Federalist Association.
2000 – Died of cardiac arrest on the 30th of October.