pfSense

In various places dates and times are displayed, e.g. rule creation and update date/time stamp.
It would be nice if the user could choose a format for those, rather than having to cope with the USAmerican "randomly mixed fields" format.
I suggest just giving the user a choice of:
MM/DD/YY
MM/DD/YYYY
DD/MM/YY
DD/MM/YYYY
YY/MM/DD
YYYY/MM/DD

and always use 24hr time (I can't imagine a firewall admin who would work in AM/PM)

The user-selected format would apply to places where an MM/DD/YY type of date is currently displayed. I would leave the "built on Fri Feb 03 22:31:34 CST 2017" and other places with that kind of format unchanged.