(I'm not even sure UTC would save you here...)
However, these jurisdictions change timezones in autumn and spring, so specifying the current timezone should work just as well as specifying UTC. 01:30:20 CEST is not repeated, nor is 01:30:20 CET.
A better workaround would be to write "Under our system that time and date may only happen at most once again!" in Cueball's speech bubble.
Maybe someone can think of a clever way though.
Here is a way to get any time you want from it: http://imgs.xkcd.com/comics/now/20h30m.png