Haha,
Few minutes ago I modified the date format just like 'Y-m-d' on the bootstrap-forum skin, and now ,I see your topic here.
Really , it's useful, also change it mannuly is not a hard work.

@haharen
Why I should do so? It would be nice, to have this ability in the settings for all.

And in this post I have 3 places with dates - in 2 different formats. So I guess, changing this thing manually in the skin will let one or two place/s untouched ...

Start by entering Y-m-d here: http://b2evolution.net/man/locales-tab

@fplanque wrote earlier:

Start by entering Y-m-d here: http://b2evolution.net/man/locales-tab

I guess, there is a misunderstanding. How can I do it for this forum here?

I was asking for a setting in my preferences for this forum.

Ok, that's not possible indeed. But we might change the format for everyone. I am annoyed with the US date format myself.

Done :p (If you use the en-US locale)