make dates internationally compatible by sticking to ISO_8601

[GitHorst]

https://en.wikipedia.org/wiki/ISO_8601

for many people, it is very confusing to read a date as MONTH/DAY/YEAR
(and let's be honest, it does not make sense at all ;))

ISO_8601 is the international standard and should look ok for most people.

[douzifly]

thanks