VLC recently hosed up my Panel clock, so this thread was super helpful AGAIN! 
I'd already fixed the VLC issue by turning off the panel icons in VLC Prefs, but the clock had reverted to default settings when I reset the Panel. It's great having day/month/date/h/m/s back thanks to the helpers here, so this is by way of another big Thank You.
Also, to extol the virtues of dconf Editor that's been so helpful for other tweaks, and for carefully getting a better idea of what's going on "behind the scenes" in Ubuntu. So thank you also for introducing those of us not already aware of it, to that app!