Catch the Wind was released in 1965 and was Donovan's first big hit. It has had numerous covers.
Universal Soldier was also a hit in 1965:
My favorite of his songs is Mellow Yellow, which was a hit in 1966:
Listening to it still brings back fond memories of elementary school. I also loved Hurdy Gurdy Man from 1968:
He just brings the 60s back, doesn't he! I wish him a very happy birthday and many more.