I opened ticket about that a while ago, originally sorting was broken too. The sorting got fixed already. The format I suggested was the ISO standard it's distinct enough not to be confused with either US and non US date formats and doesn't include names so there is no localisation format.
So instead of MM/DD/YYYY or DD.MM.YYYY it'd be YYYY-MM-DD
I'm glad there are more people running into confusions with the dates
perhaps if we get some people together who have the same issues we can get this prioritized
