title: How to load all dart DateFormat locale in flutter?
body: <p>In Flutter app, intl package load only <a href="https://flutter.io/tutorials/internationalization/#setting-up" rel="noreferrer">15 languages</a>. However Dart <a href="https://www.dartdocs.org/documentation/intl/latest/intl/DateFormat-class.html" rel="noreferrer">DateFormat</a> support many more. I do not need translation, but need correct <code>DateFormat</code>. How to load all <code>DateFormat</code> locale?</p>