Formatting
final date = HijriDate.fromHijri(1445, 9, 15);
print(date.fullDate()); // Wednesday, Ramadan 15, 1445 h
print(date.toString()); // 15/09/1445H (or yyyy/mm/dd in ar)
print(date.toFormat('DDDD, MMMM dd, yyyy')); // Wednesday, Ramadan 15, 1445
print(date.toFormat('dd/mm/yyyy')); // 15/09/1445
// Tokens:
// DDDD: full weekday | DD: short weekday
// MMMM: full month | MM: short month
// yyyy: full year | yy: 2-digit year
// dd/mm: day/month digits localized to current language