|Broadcast area||Lansing-East Lansing metropolitan area|
|Branding||975 Now FM|
|Slogan||Lansing's Number One Hit Music Station|
|First air date||June 1960|
|Format||Adult Top 40 (CHR)|
|Callsign meaning||JIM Gross, son of original owner Harold Gross|
|Owner||Townsquare Media |
(Townsquare Media Lansing License, LLC)
|Sister stations||WFMK, WITL-FM, WJIM, WMMQ, WVFN|
The station has had the WJIM-FM calls continuously since it signed on in 1960. For over three decades, WJIM-FM broadcast an easy listening/beautiful music format, which evolved during the early 1990s into a soft adult contemporary sound. On Labor Day in 1995, WJIM-FM switched from AC to "Oldies 97.5." The change came days after WIBM dropped its longtime oldies format in favor of country to compete with WITL-FM. The station's "good times and great oldies" format was very popular in Lansing for over a decade, with the station consistently rated in the top ten (and frequently the top five) 12+ in the Arbitron ratings.
On September 13, 2005, crosstown competitor WHZZ 101.7 FM abruptly flipped from adult-leaning CHR as "Z101.7" to Variety Hits as "Mike FM." WJIM-FM stepped in to fill the Top 40 void in the market two days later, as "Oldies 97.5" signed off with Don McLean's "American Pie" at 10 a.m. on September 15 and "The New 97-5" (usually just called "97.5, Lansing's New Hit Music Station") debuted in its place. Longtime "Oldies 97.5" morning man Rich Michaels moved to sister station WMMQ. On September 7, 2007, the station repositioned from "The New 97-5" to "97-5 Now FM."
The WJIM call letters have a history in Lansing of being associated with Top 40 music, as WJIM-AM 1240 was a leading Top 40 station in Lansing during the 1960s as "Big Jim 1240."
On August 30, 2013, a deal was announced in which Townsquare Media would acquire 53 Cumulus Media stations, including WJIM-FM, for $238 million. The deal was part of Cumulus' acquisition of Dial Global; Townsquare and Dial Global were both controlled by Oaktree Capital Management. The sale to Townsquare was completed on November 14, 2013.
- "Official: Cumulus Buys Dial Global, Spins Some Stations To Townsquare; Peak Stations Sold To Townsquare, Fresno Spun To Cumulus". All Access. August 30, 2013. Retrieved August 30, 2013.
- "Cumulus Makes Dial Global And Townsquare Deals Official". RadioInsight. August 30, 2013. Retrieved August 30, 2013.
- "Cumulus-Townsquare-Peak Deal Closes". All Access. November 15, 2013. Retrieved November 16, 2013.