Initialized English (Denmark) translation

en_DK is a locale used by many ISO 8601 enjoyers, so the only translation i did was change the date formats the en_DK locale:

$ locale
LANG=en_DK.UTF-8
[...]
LC_TIME="en_DK.UTF-8"
[...]
$ locale -k LC_TIME
[...]
am_pm=";"
d_t_fmt="%Y-%m-%dT%T %Z"
d_fmt="%Y-%m-%d"
t_fmt="%T"
t_fmt_ampm=""
[...]
date_fmt="%Y-%m-%dT%T %Z"
[...]

it looks like this in the simple formatting:

and like this for the detailed formatting:

(don't mind the gradience theming crimes)

It may not look simple and readable to you, but once you get used to it, it makes a lot of sense. Furthermore I don't think a lot of people besides iso8601 enjoyers use this locale so it doesn't hurt anyone to cater to our needs.

related: #3352 (closed) #2291 (closed)