Well, technically, you’d only need to remove one visibility condition here: skin.osmc/xml/Includes_Time_NowPlaying.xml at f6641f8fec35294acbc63936466deadef2ce3d3b · osmc/skin.osmc · GitHub
That one would need to be empty: <visible></visible> and then you could additionally edit the visibility conditions of the label controls above: skin.osmc/xml/Includes_Time_NowPlaying.xml at f6641f8fec35294acbc63936466deadef2ce3d3b · osmc/skin.osmc · GitHub would only have to be <visible>Skin.HasSetting(Dateaboveclock)</visible> and skin.osmc/xml/Includes_Time_NowPlaying.xml at f6641f8fec35294acbc63936466deadef2ce3d3b · osmc/skin.osmc · GitHub would have to be removed entirely. Then you’d never see the now playing notification (for music and video playback) and only time and date.
This will be overwritten with every OSMC update though.