K-Day

K-Day or KDAY may refer to:

Radio stations

 * KDAY, in Greater Los Angeles, U.S.
 * KDEY-FM, a simulcast
 * KSRW (FM), in Independence, California, U.S., formerly KDAY-FM 1991–2004

Other uses

 * K-Day, a military designation of days and hours
 * K-Day, an annual event at Michigan Technological University
 * K-Days, an annual exhibition in Edmonton, Alberta, Canada
 * Dayton International Airport, ICAO code KDAY