is a commercial radio station
located in Denver, Colorado
, broadcasting on 101.1 FM
airs a soft adult contemporary
music format branded as "KOSI 101".
signed on in 1968 airing an easy listening
format. At the time, it was paired with KOSI 1430 AM. The stations were owned by Bill Armstrong, who would later become a Republican congressman and two term U.S. Senator. Armstrong sold KOSI-FM to Westinghouse Broadcasting in 1981. KOSI-AM then became KEZW
in March of that year. By 1990 the format evolved into its current mainstream adult contemporary music format. KOSI currently airs the syndicated Delilah
is the only radio station in the Denver
area to switch its format entirely to holiday music
during the Christmas
season. The change generally takes place during the week of Thanksgiving
and continues until 12:00 AM on December 26, at which point the format goes back to soft adult contemporary
. In 2008 the Christmas music continued until December 27.
On thanksgiving, KOSI changed to an All-Christmas music format, but continues to stream their light rock on this alternate station.