/usr/share/octave/4.2.2/m/time/ is in octave-common 4.2.2-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/4.2.2/m/time/addtodate.m
/usr/share/octave/4.2.2/m/time/asctime.m
/usr/share/octave/4.2.2/m/time/calendar.m
/usr/share/octave/4.2.2/m/time/clock.m
/usr/share/octave/4.2.2/m/time/ctime.m
/usr/share/octave/4.2.2/m/time/date.m
/usr/share/octave/4.2.2/m/time/datenum.m
/usr/share/octave/4.2.2/m/time/datestr.m
/usr/share/octave/4.2.2/m/time/datevec.m
/usr/share/octave/4.2.2/m/time/eomday.m
/usr/share/octave/4.2.2/m/time/etime.m
/usr/share/octave/4.2.2/m/time/is_leap_year.m
/usr/share/octave/4.2.2/m/time/now.m
/usr/share/octave/4.2.2/m/time/weekday.m