How to compare two dates that are constructed differently in Dart?

Question

I am trying to compare two dates, one built with DateTime.parse() and another one build with DateTime(), but so fat I have not been sucessful.

Here is my code snippet.

void main(){
  String dateTime = '2020-02-03T08:30:00.000Z';
  int year = 2020;
  int month = 2;
  int day = 3;
  int hour = 8;
  int minute = 30;
  print(DateTime.parse(dateTime).isAtSameMomentAs(DateTime(year, month, day, hour, minute)));
}

The comparison method returns false, although the dates are supposed to be the same.

What is the correct way of going about this?

Answer 1

You may do that by converting the other date into utc and then comparing them with isAtSameMomentAs method. working code below:

void main(){
  String dateTime = '2020-02-03T08:30:00.000Z';
  int year = 2020;
  int month = 2;
  int day = 3;
  int hour = 8;
  int minute = 30;

  var dt = DateTime.utc(year,month,day,hour,minute);
  print(dt);

  print(DateTime.parse(dateTime).isAtSameMomentAs(dt));

  // 2020-02-03 08:30:00.000Z
  // 2020-02-03 08:30:00.000Z
  // true

}

Hope this answers your question.