Ordinal day 1th 2nd,etc

[amreniouinnovent]

I wonder if you could support ordinal number for the day of the month
1st, 2nd,3rd,4th, 21st, etc

I used a function but I think DateFormat should support it

  String today() {
    final DateTime now = DateTime.now();
    String suffix = 'th';
    final int digit = now.day % 10;
    if ((digit > 0 && digit < 4) && (now.day < 11 || now.day > 13)) {
      suffix = <String>['st', 'nd', 'rd'][digit - 1];
    }
    return DateFormat("E, MMM d'$suffix'").format(now); // 'Sun, Jun 30th'
  }

[alan-knight]

We probably won't do this directly in Dart, as the current formatting is implemented. The underlying facilities in browsers are better now, so we're likely to add things by making them pass through to JS Intl in browsers, and to ICU or operating system libraries on other platforms.

[amreniouinnovent]

@alan-knight As you mentioned it won't be implemented directly in intl I opened an issue in the Flutter repo
flutter/flutter#37221
I will close this issue for now.
If you want to improve the proposal on the flutter repo please put your ideas there.
Thank you.

[suztomo]

I have the same need for this for showing birthdays. Given a number, I want to show "st", "nd", "rd", or "th". For example,
"1st birthday", "2nd birthday", "3rd birthday" ... "11th birthday", ... "21st birthday", ... "101st birthday".

String ordinalAge(int age) {
  if (I18n.locale == const Locale('ja')) {
    // No ordinal number for Japanese
    return '$age';
  }
  if (age == 11 || age == 12 || age == 13) {
    return '${age}th';
  }
  if (age % 10 == 1) {
    return '${age}st';
  }
  if (age % 10 == 2) {
    return '${age}nd';
  }
  if (age % 10 == 3) {
    return '${age}rd';
  }
  return '${age}th';
}

[AlexanderFarkas]

It seems reasonable to implement it in dart. Web does ordinals better, but what about mobile - is calling native Kotlin/Swift option?
Also, ordinals are not magic, it's pure calculus.