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Cannot format date to March 19, 2024 at 11:06:32 AM UTC+5" type in flutter

I want to format my DateTime.now() to March 19, 2024 at 11:06:32 AM UTC+5" but its Data type should be DateTime.

I am getting Date in that format but it is in String:

String formattedDate = DateFormat("MMMM dd, yyyy 'at' hh:mm:ss a 'UTC+5'").format(DateTime.now().toUtc().add(Duration(hours: 5)));

So, i want that String in DateTime Data Type which i am unable to do.

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2

Answers


  1. 0

    You can generalize and use 'UTC'Z instead of 'UTC+5', and for ease of use define your format as a variable

    DateFormat specialFormat = DateFormat("MMMM d, yyyy 'at' hh:mm:ss a 'UTC'Z");

    Now you need to use the DateFormat.parse() method

    try {
    String inputString = "March 19, 2024 at 11:06:32 AM UTC+5";
    DateTime parsedDate = specialFormat.parse(inputString);
} catch (e) {
    print("Error parsing date: $e");
}
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  2. 0

    I’m not aware of any built-in way to print UTC offsets nicely, so I think you’ll have to format DateTime.timeZoneOffset manually:

    import 'package:intl/intl.dart';

extension on DateFormat {
  String formatWithOffset(DateTime dateTime) {
    var offset = dateTime.timeZoneOffset;
    var offsetStringParts = ['UTC'];
    if (offset != Duration.zero) {
      if (offset.isNegative) {
        offsetStringParts.add('-');
        offset = -offset;
      } else {
        offsetStringParts.add('+');
      }

      if (offset.inMinutes % 60 == 0) {
        offsetStringParts.add('${offset.inHours}');
      } else {
        offsetStringParts
          ..add('${offset.inHours}'.padLeft(2, '0'))
          ..add('${offset.inMinutes % 60}'.padLeft(2, '0'));
      }
    }

    return '${format(dateTime)} ${offsetStringParts.join()}';
  }
}

/// A [DateTime] object that overrides [timeZoneOffset].
class FakeDateTime extends DateTime {
  @override
  Duration timeZoneOffset = Duration.zero;

  FakeDateTime.from(DateTime original)
      : super(
          original.year,
          original.month,
          original.day,
          original.hour,
          original.minute,
          original.second,
          original.millisecond,
          original.microsecond,
        );
}

void main() {
  var now = FakeDateTime.from(DateTime.now());
  var format = DateFormat("MMMM dd, yyyy 'at' hh:mm:ss a");

  // Prints: 2024-04-21 12:55:15.138
  print(now);

  // Prints: April 21, 2024 at 12:55:15 PM UTC
  print(format.formatWithOffset(now));

  // Prints: April 21, 2024 at 12:55:15 PM UTC+5
  now.timeZoneOffset = const Duration(hours: 5);
  print(format.formatWithOffset(now));

  // Prints: April 21, 2024 at 12:55:15 PM UTC-0715
  now.timeZoneOffset = -const Duration(hours: 7, minutes: 15);
  print(format.formatWithOffset(now));
}

    The formatWithOffset implementation could be simplified by removing the different formatting cases (currently it handles time zone offsets of zero, time zone offsets with a whole number of hours, and time zone offsets with a non-zero minute component differently).

    Note that if you want to handle DateTime objects in a time zone other than the local time zone, you probably should be using TZDateTime objects from package:timezone instead.

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