why justify_interval('360 days'::interval) results '1 year'

Question

For some reason justify_interval(now() - \'2013-02-14\'::timestamptz) produces weird results:

postgres=# select justify_interval(concat(365*4 +1         


        

Answer 1

accrding to docs:

justify_interval(interval) - Adjust interval using justify_days and justify_hours, with additional sign adjustments

and further:

justify_days(interval) - Adjust interval so 30-day time periods are represented as months

So 30*12=360

Not expected but obviously defined in docs...