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How to convert date with UTC or EDT text in it, Flutter Date time

What is this Date time:
"2024-08-29 13:15:05 +0000 UTC" OR
"2024-08-29 01:33:40.774468453 -0400 EDT"

How I can convert & reformat it in flutter, what is the date format it will take ??

tried native flutter classes & intl library

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2

Answers


  1. 0

    You have to add the intl package to your pubspec.yaml:

    You can use the DateTime.parse() method to convert the date strings into DateTime objects. However, since the second format includes fractional seconds and a timezone, you might want to use DateTime.parse() directly, as it supports ISO 8601 format well.

      String dateString1 = "2024-08-29 13:15:05 +0000 UTC";
  String dateString2 = "2024-08-29 01:33:40.774468453 -0400 EDT";

  // Parse the date strings
  DateTime dateTime1 = DateTime.parse(dateString1.replaceAll(" UTC", ""));
  DateTime dateTime2 = DateTime.parse(dateString2);

  // Format the dates
  String formattedDate1 = DateFormat('yyyy-MM-dd – kk:mm').format(dateTime1);
  String formattedDate2 = DateFormat('yyyy-MM-dd – kk:mm').format(dateTime2);

  print("Formatted Date 1: $formattedDate1");
  print("Formatted Date 2: $formattedDate2");
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  2. 0

    To handle dynamic fractional seconds in your date strings, you can extract the fractional seconds separately and add them to the parsed DateTime object.

      String dateString = "2024-08-29 01:33:40.774468453 -0400 EDT";

  // Remove the timezone abbreviation at the end
  String cleanDate = dateString.replaceAll(RegExp(r's[A-Z]{3,4}$'), '');

  // Extract fractional seconds
  RegExp regex = RegExp(r'.(d+)');
  Match? match = regex.firstMatch(cleanDate);
  String fractionalPart = match != null ? match.group(1)! : '';
  cleanDate = cleanDate.replaceAll(RegExp(r'.d+'), '');

  // Define the date format without fractional seconds
  DateFormat dateFormat = DateFormat("yyyy-MM-dd HH:mm:ss ZZZ");

  // Parse the date string
  DateTime dateTime = dateFormat.parse(cleanDate, true); // true for UTC

  // Add fractional seconds to the DateTime object
  if (fractionalPart.isNotEmpty) {
    // Convert fractional seconds to microseconds
    int microseconds =
        int.parse(fractionalPart.padRight(6, '0').substring(0, 6));
    dateTime = dateTime.add(Duration(microseconds: microseconds));
  }

  print("Parsed DateTime: $dateTime");
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