DECLARE
    proper_tz TEXT := COALESCE(
        oils_json_to_text((
            SELECT value
              FROM  actor.org_unit_ancestor_setting('lib.timezone',NEW.circ_lib)
              LIMIT 1
        )),
        CURRENT_SETTING('timezone')
    );
BEGIN

    IF (EXTRACT(EPOCH FROM NEW.duration)::INT % EXTRACT(EPOCH FROM '1 day'::INTERVAL)::INT) = 0 -- day-granular duration
        AND SUBSTRING((NEW.due_date AT TIME ZONE proper_tz)::TIME::TEXT FROM 1 FOR 8) <> '23:59:59' THEN -- has not yet been pushed
        NEW.due_date = ((NEW.due_date AT TIME ZONE proper_tz)::DATE + '1 day'::INTERVAL - '1 second'::INTERVAL) || ' ' || proper_tz;
    END IF;

    RETURN NEW;
END;