Heard where? KPBS and KSWB web sites have no information about this at all. KNSD is moving to channel 17, and have had their channel 17 transmitter up and running with a test pattern for a while now. There is no transmitter broadcasting on channel 26 yet, so if KSWB is moving on February 14th, then they are leaving it to the last minute.
And why are either of these stations moving at all? Their existing broadcast channels are not being reallocated, so there is no need.