How can i convert a DateTime variable "2022-09-29T07:26:52.000Z" to seconds in dart flutter?

Question

I have a variable in dart string and would like to convert it all to seconds or minutes....

String x = "2022-09-29T07:26:52.000Z"

I want the opposite of this code below

final newYearsDay =
    DateTime.fromMillisecondsSinceEpoch(1640979000000, isUtc:true);
print(newYearsDay); // 2022-01-01 10:00:00.000Z

I want to be able to get this back to seconds from the current timedate formart

I'm not sure, I just want to get the equivalent in hours or minutes or seconds... — Flochristos, Oct 21 '22 at 18:33
@Flochristos What does that mean? If you want the number of seconds since the Unix "epoch", see [How do I convert a date/time string to a DateTime object in Dart?](https://stackoverflow.com/q/49385303/) to get a `DateTime` object, and then you can use `dateTime.millisecondsSinceEpoch ~/ 1000`. If that's not what you want, then provide an *example* of what you do want. — jamesdlin, Oct 21 '22 at 18:35
@jamesdlin i want the exact opposite of what you just said.. ```final newYearsDay = DateTime.fromMillisecondsSinceEpoch(1640979000000, isUtc:true); print(newYearsDay); // 2022-01-01 10:00:00.000Z``` Opposite of this, to turn back the datetime to seconds — Flochristos, Oct 21 '22 at 18:39

eamirho3ein · Accepted Answer · 2022-10-21T18:45:33.017

1

You can convert your string to a datetime by using intl like this:

String x = "2022-09-29T07:26:52.000Z";
var dateTime = DateFormat('yyyy-MM-ddThh:mm:ss').parse(x);

and for get the number of milliseconds since the Unix epoch :

print("numbers= ${dateTime.millisecondsSinceEpoch}")

edited Oct 21 '22 at 18:45

answered Oct 21 '22 at 18:37

eamirho3ein

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Not really, here, you only got the individual time in it, what i want is to get all of that into a single value which is seconds or minutes... or hours... – Flochristos Oct 21 '22 at 18:44
check out last part of my updated answer @Flochristos – eamirho3ein Oct 21 '22 at 18:44
that is exactly opposite of what you added to question – eamirho3ein Oct 21 '22 at 18:48
Okay, lemme check...brb – Flochristos Oct 21 '22 at 18:49
It is...... Thanks so much... i was able to get the precise answer with ```var ttt = (dateTime.millisecondsSinceEpoch / 1000);``` – Flochristos Oct 21 '22 at 18:57

score 1 · Answer 2 · answered Oct 21 '22 at 18:45

DateTime has a parse static that can parse many (but not all) date formats. The ISO8601 format is one that it can parse - including the trailing Z.

void main() {
  final dt1 = DateTime.parse('2022-09-29T07:26:52.000Z');

  print(dt1.millisecondsSinceEpoch ~/ 1000);
}

How can i convert a DateTime variable "2022-09-29T07:26:52.000Z" to seconds in dart flutter?

2 Answers2