KOST 103.5 plays holiday music during the Christmas season every year in the month of December. In the 2014 season, the radio station witnessed significant increase in the ratings. KOST 103.5 has partnered with ReelWorld to produce a Christmas Jingle Package for the 2015 season.
The joint production of KOST 103.5 and ReelWorld for the 2015 holiday season contains both contemporary as well as evergreen Yuletide classics. The radio station considers the holiday season to be one of the most important times of a year. With a growth in audience share by 10.4 percent in 2014, KOST 103.5 strives to bring tunes that create emotional bonds during the holiday season.