If you create a Day and call next() it will not have all fields calculated. It looks intentional, but is it useful?

Pike v7.9 release 11 running Hilfe v3.5 (Incremental Pike Frontend)

object d = Calendar.ISO.Day(2013,8,14); object e = d->next(); e->md;

(1) Result: -1000

e->m;

(2) Result: -1000

e->make_month();

(3) Result: 0

e->md;

(4) Result: 15

e->m;

(5) Result: 8

or to put it in more surprising terms

object d = Calendar.ISO.Day(2013,8,14)->next(); d->m;

(1) Result: -1000

d; // Forces _sprintf to call make_month()

(2) Result: Day(Thu 15 Aug 2013)

d->m;

(3) Result: 8