Complex sentence: In February 2004, WLUS's call letters were changed back to its heritage call letters, WDVH and WDJY's were changed to WDVH-FM.
Split into simpler sentences: In February 2004, WLUS's call letters were changed back to its heritage call sign, WDVH. At the same time, WDJY's call letters changed to WDVH-FM.