Help with detecting 12/24 hour setting

Hi, so I want to be able to display the text “24H”, “AM”, or “PM” depending on which setting the user has selected. I’ve got this conditional: $_____?24H:#Da#$, but I can’t find any way of detecting which setting the user has selected using tags. Is this possible? And if so, how can I go about doing it?

I found this thread. Maybe this should be a feature request? It’d be nice to have a tag that would contain this setting.