Timeline
| 1906 | December 10 - Harold Adamson is born in Greenville, NJ |
| 1927 | Graduates from the University of Kansas |
| 1930 | Graduates from Harvard University. Extracurricular activity includes writing the famous Hasty Pudding Shows |
| 1930 | Moves to NYC to pursue acting and songwriting. Begins contributing songs to vaudeville sketches and variety shows |
| 1931 | Smith Ballew's recording of TIME ON MY HANDS reaches #6 on the Billboard pop charts |
| 1931 | August 27 - Earl Carroll's Vanities of 1931 opens on Broadway at the Earl Carroll Theatre for a 556 performance run |
| 1932 | Joins the American Society of Composers, Authors and Publishers |
| 1933 | George Olsen's recording of EVERYTHING I HAVE IS YOURS reaches the top twenty on the Billboard charts |
| 1933 | Moves to Hollywood under contract with MGM |
| 1934 | Rudy Vallee's recording of EVERYTHING I HAVE IS YOURS reaches #3 on the Billboard pop charts |
| 1935 | Freddy Martin's recording of EVERYTHING'S BEEN DONE BEFORE reaches #8 on the pop charts |
| 1936 | DID I REMEMBER reaches #1 on the billboard charts with a recording by Shep Fields |
| 1936 | Benny Goodman's recording of IT'S BEEN SO LONG reaches #1 on the Billboard charts |
| 1936 | YOU is a #1 hit with a recording by Tommy Dorsey |
| 1937 | I LOVE TO WHISTLE is a #5 hit on the Billboard charts with a recording by Fats Waller |
| 1937 | Mildred Bailey's recording of WHERE ARE YOU is a #5 hit recording on the Billboard charts |
| 1937 | Teddy Wilson's recording of WHERE THE LAZY RIVER GOES reaches #7 on the Billboard charts |
| 1937 | Fats Waller reaches the top twenty with his recording of YOU'RE MY DISH |
| 1937 | Adamson receives an Oscar Nomination for Best Original song for DID I REMEMBER in the film Suzy |
| 1938 | Dolly Dawn has a #1 hit on the Billboard charts with a recording of YOU'RE A SWEETHEART |
| 1939 | Glenn Miller's recording of LITTLE MAN WHO WASN'T THERE reaches the #7 spot on the Billboard charts |
| 1939 | Jan Savitt reaches the top twenty with a recording of SEVEN TWENTY IN THE BOOKS |
| 1939 | Adamson receives an Oscar Nomination for Best Original Song for MY OWN in the film That Certain Age |
| 1940 | FERRY BOAT SERENADE is a #1 hit on the Billboard charts with a recording by the Andrews Sisters |
| 1940 | Orrin Tucker has a top fifteen hit recording of MY RESISTANCE IS LOW |
| 1940 | THIS CHANGING WORLD reaches the top ten on the Billboard pop charts with a recording by Glenn Miller |
| 1940 | Glenn Miller's recording of WOODPECKER reaches #1 on the Billboard charts |
| 1941 | AURORA reaches the top ten on the Billboard pop charts with a recording by the Andrews Sisters |
| 1941 | December 25 - Banjo Eyes opens on Broadway at the Hollywood Theatre for a 126 performance run |
| 1942 | Harry James' recording of MANHATTAN SERENADE reaches the top ten on the Billboard charts |
| 1942 | Connee Boswell's recording of MOONLIGHT MOON reaches the top twenty on the pop charts |
| 1943 | COMIN' IN ON A WING AND A PRAYER reaches #1 on the pop charts with a recording by the Song Spinners |
| 1943 | Tommy Dorsey's cover recording of MANHATTAN SERENADE reaches the #4 spot on the Billboard charts |
| 1943 | Glenn Miller's cover recording of MOONLIGHT MOON is a #11 hit on the Billboard charts |
| 1944 | Dick Haymes' recording of HOW BLUE THE NIGHT reaches the #11 spot on the Billboard charts |
| 1944 | HOW MANY TIMES DO I HAVE TO TELL YOU hits the top thirty on the Billboard top 100 with a recording by Dick Haymes |
| 1944 | Frank Sinatra's recording of I COULDN'T SLEEP A WINK LAST NIGHT reaches the #4 spot on the Billboard charts |
| 1944 | LOVELY WAY TO SPEND AN EVENING reaches #11 on the Billboard charts with a recording by Frank Sinatra |
| 1944 | Adamson receives an Oscar Nomination for Best Original song for CHANGE OF HEART in the film Hit Parade of 1943 |
| 1945 | Perry Como has a top fifteen hit recording of HERE COMES HEAVEN AGAIN |
| 1945 | Harry James' recording of I DON'T CARE WHO KNOWS IT reaches #8 on the Billboard pop charts |
| 1945 | Adamson receives an Oscar Nomination for Best Original song for I COULDN'T SLEEP A WIND LAST NIGHT in the film Higher and Higher |
| 1948 | Billy Eckstine's cover recording of the 1933 hit song EVERYTHING I HAVE IS YOURS reaches the #30 spot on the Billboard charts |
| 1948 | Ray Noble's recording of IT'S A MOST UNUSUAL DAY reaches the top twenty on the Billboard charts |
| 1948 | November 13 - As the Girls Go opens on Broadway at the Winter Garden Theatre for a 414 performance run |
| 1950 | Jack Owens' recording of the 1938 #1 hit song YOU'RE A SWEETHEART reaches the top thirty on the Billboard charts |
| 1950 | Focuses on writing full scores for films including Around the World in 80 Days and An Affair to Remember |
| 1951 | Nat King Cole's recording of TOO YOUNG TO GO STEADY reaches #1 on the Billboard charts |
| 1952 | Eddie Fisher's cover recording of EVERYTHING I HAVE IS YOURS reaches the top twenty five on the Billboard charts |
| 1952 | Sammy Kaye's cover recording of the 1936 hit YOU reaches the top thirty on the Billboard charts |