Every 6 months I recreate a list of devices and places to change the time that are not doing it automatically. Here is my list which should probably be a Spicelist for people to continue to add to.
Servers, Desktops and Laptops that do not connect to a Windows domain or query an NTP service
Copiers
Plotters
Printers
Postage meter
Battery operated clocks
parking lights
sprinkler system
wristwatches
Keep adding what you need to check.....
Michael