Get date

main.dart

import 'package:intl/intl.dart';

void main() {
  String _generateDatetime() {
    return DateTime.now()
        .toUtc()
        .toString()
        .replaceAll(RegExp(r'\.\d*Z$'), 'Z')
        .replaceAll(RegExp(r'[:-]|\.\d{3}'), '')
        .split(' ')
        .join('T');
  }

  var now = _generateDatetime();
  now = _getDate(now);

  print(now);

  final other = DateFormat('yyyyMMdd').format(DateTime.now().toUtc());

  print(other);

  print(now == other);
}

String _getDate(String dateTime) {
  return dateTime.substring(0, 8);
}