Morning Has Broken
"Morning Has Broken" is a popular hymn first published in 1931 by English author Eleanor Farjeon and is set to a traditional Scottish Gaelic tune known as "Bunessan" (it shares this tune with the 19th century Christmas Carol "Child in the Manger"). It is often sung in children's services. English pop musician and folk singer Cat Stevens (known as Yusuf Islam since 1978 after becoming a Muslim in 1977) included a version on his 1971 album Teaser and the Firecat. The song became identified with Stevens when it reached number six on the U.S. Billboard Hot 100 and number one on the U.S. easy listening chart in 1972.

-source: https://en.wikipedia.org/wiki/Morning_Has_Broken