# man ls
...cut...
-E The same as -l, except displays time to the
nanosecond and with one format for all files
regardless of age: yyyy-mm-dd
hh:mm:ss.nnnnnnnnn (ISO 8601:2000 format).
In addition, this option displays the offset
from UTC in ISO 8601:2000 standard format
(+hhmm or -hhmm) or no characters if the offset
is indeterminable. The offset reflects the
appropriate standard or alternate offset in
force at the file's displayed date and time,
under the current timezone.