extension DateTimeX on DateTime {
  String get hourMinute {
    return '${hour.toString().padLeft(2, '0')}:${minute.toString().padLeft(2, '0')}';
  }

  /// Format: 2021-01-01-0000
  String get numStr {
    final year = this.year.toString();
    final month = this.month.toString().padLeft(2, '0');
    final day = this.day.toString().padLeft(2, '0');
    final hour = this.hour.toString().padLeft(2, '0');
    final minute = this.minute.toString().padLeft(2, '0');
    return '$year-$month-$day-$hour$minute';
  }
}