Getting time to display in 24H format on GDM login window?

[Gilles Gravier]

Hi!

I've tried all I could think of. I want to get the GDM login window
(with user selector) to display the time in 24H format. Can't find the
place to select that.

Also... can't find a place to CHANGE the friggin' GDM login window
theme. Any idea?

Thanks in advance,
Gilles.