The
Julian Date method of indicating a particular date is as follows:
yyyyddd
yyyy = year
ddd = day
This method of
datekeeping is used extensively by the
US Military, although sometimes in a modified format (yddd). When performing
maintenance on
US Navy aircraft, all of the work is documented using the julian date. If an inspection is on a
calendar basis (30-day inspection, 7-day inspection), the month and day of the week have no
bearing on when an
inspection is due (30 days means 30 days, not February 1st to March 1st, which is less than 30 days).