“Time Changes Everything” is a Western swing standard, written by Tommy Duncan, the longtime vocalist with Bob Wills and his Texas Playboys. The Playboys recorded it in 1940, and it became one of the band’s hit sides that year.
The song is a ballad of a healed heart. The singer looks back on a love that ended and finds that the hurt has faded; time, he concludes, changes everything, dulling old pain and rearranging what once seemed fixed.
The song crossed from Western swing into country and bluegrass, where Bill Monroe took it up.