/usr/share/help/uk/gedit/gedit-plugins-insert-date-time.page is in gedit-common 3.10.4-0ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/help/uk/gedit/../../../help-langpack/uk/gedit/gedit-plugins-insert-date-time.page