iso_week_days    1195 lib/strftime.c             int days = iso_week_days (tp->tm_yday, tp->tm_wday);
iso_week_days    1201 lib/strftime.c                 days = iso_week_days (tp->tm_yday + (365 + __isleap (year - 1)),
iso_week_days    1206 lib/strftime.c                 int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)),