Complex sentence: On Monday, July 13,2009 WWQM appeared to be switching formats, playing oldies music from the 50s, 60s, and 70s, but the switch is only for one day and will return to the country music format on Tuesday, July 14,2009.
Split into simpler sentences: On Monday, July 13,2009 WWQM appeared to be switching formats, playing oldies music from the 50s, 60s, and 70s. The switch was anticipated to be only for one day and with a return to the country music format on Tuesday, July 14,2009.