/usr/share/omf/ is in gnome-time-admin 3.0.0-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/omf/time-admin/
/usr/share/omf/time-admin/time-admin-C.omf
/usr/share/omf/time-admin/time-admin-ca.omf
/usr/share/omf/time-admin/time-admin-cs.omf
/usr/share/omf/time-admin/time-admin-de.omf
/usr/share/omf/time-admin/time-admin-el.omf
/usr/share/omf/time-admin/time-admin-en_GB.omf
/usr/share/omf/time-admin/time-admin-es.omf
/usr/share/omf/time-admin/time-admin-fr.omf
/usr/share/omf/time-admin/time-admin-gl.omf
/usr/share/omf/time-admin/time-admin-it.omf
/usr/share/omf/time-admin/time-admin-oc.omf
/usr/share/omf/time-admin/time-admin-pt_BR.omf
/usr/share/omf/time-admin/time-admin-ru.omf
/usr/share/omf/time-admin/time-admin-sl.omf
/usr/share/omf/time-admin/time-admin-sv.omf
/usr/share/omf/time-admin/time-admin-zh_CN.omf