MON_1
for (month = MON_1; month <= MON_12; month++)
months[month - MON_1] = nl_langinfo(month);
_dtconv.month_names[0] = strdup(nl_langinfo(MON_1));
case MON_1: case MON_2: case MON_3: case MON_4:
ret = (char *)ltime->month[_REL(MON_1)];
{ MON_1, "January" },
{ MON_1, "января" },
{ MON_1, "January" },
{ MON_1, "January" },