Time format change option?

It’s really nice that there has been added the time stamps to messages sent and received in the chat windows you have with friends. However it shows in 12h format and there is no way to change that as far as I can find. No option or radio button to switch from 12h to 24h or the other way around.
I am from Europe and hence using 24h format so the AM/PM format is kinda annoying to me to be honest. I would like to have the possibility to change that.

Before someone mentions that it follows the settings from Windows I would like to say that I use 24h format in Windows already and I have tried changing that back and forth and restarting the Battlenet Client every time to see if any changes reflected from that.
So far nothing can change the chat window time format.

Thank you.