Datetime In Dart

DateTime In Dart

Date and time are often used in our day-to-day activities. As a programmer you need to know how to find a date and time? How to format date? and how to perform different calculation in date?

How To Get Date And Time

Use the following code to get the current date and time in the dart.

void main() {
  print(DateTime.now());
}

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Get Year, Month, Day Of Datetime In Dart

Here is the way to get a year, month, day, hour, minutes, and seconds in Dart. You can convert DateTime to String by using the toString() method.

Example

void main() {
  DateTime datetime = DateTime.now();
  print("Year is " + datetime.year.toString());
  print("Month is " + datetime.month.toString());
  print("Day is ${datetime.day}"); // If you don't want to use .toString
  print("Hour is " + datetime.hour.toString());
  print("Minutes is " + datetime.minute.toString());
  print("Second is " + datetime.second.toString());
}

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How To Convert Datetime To String In Dart

Use the following code to convert DateTime to String in the dart.

void main() {
  String datetime = DateTime.now().toString();
  print(datetime);
}

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How To Convert String To DateTime

You cannot get year, months, or day directly and cannot perform date calculation using a String if that String contains the correct DateTime value. In such a situation, you first need to convert String to DateTime.

void main() {
  String myDateInString = "2022-05-01";
  DateTime myConvertedDate = DateTime.parse(myDateInString);
  print("Year is " + myConvertedDate.year.toString());
  print("Month is " + myConvertedDate.month.toString());
  print("Day is " + myConvertedDate.day.toString());
}

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Methods Supported By Datetime In Dart

You can use DateTime methods if you want to add days, hours, or minutes to DateTime. Let us suppose you have created a DateTime object named mybirthday. DateTime mybirthday = DateTime.parse("1997-05-14");

Method Example
add(Duration) myBirthday.add(Duration(days: 1));
subtract(Duration) myBirthday.subtract(Duration(days: 1));
Info

Note: You can set a duration to days, hours, minutes, seconds, milliseconds, and microseconds. To understand it more, look at the example below.

Example: Add Date In Dart

void main() {
  DateTime myBirthday = DateTime.parse("1997-05-14");
  myBirthday = myBirthday.add(Duration(days: 1));
  print("Year is " + myBirthday.year.toString());
  print("Month is " + myBirthday.month.toString());
  print("Day is " + myBirthday.day.toString());
}

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Example: Subtract Date In Dart

void main() {
  DateTime myBirthday = DateTime.parse("1997-05-14");
  myBirthday = myBirthday.subtract(Duration(days: 1));
  print("Year is " + myBirthday.year.toString());
  print("Month is " + myBirthday.month.toString());
  print("Day is " + myBirthday.day.toString());
}

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Find Difference Between Two Dates In Dart

Suppose you want to find the difference between two dates in dart. There is a straightforward way.

void main() {
  DateTime myBirthday = DateTime.parse("1997-05-14");
  DateTime today = DateTime.now();
  Duration diff = today.difference(myBirthday);
  print("Difference in days: " + diff.inDays.toString());
  print("Difference in hours: " + diff.inHours.toString());
  print("Difference in minutes: " + diff.inMinutes.toString());
  print("Difference in seconds: " + diff.inSeconds.toString());
  print("Difference in milliseconds: " + diff.inMilliseconds.toString());
  print("Difference in microseconds: " + diff.inMicroseconds.toString());
}

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Name Description
inDays Convert duration in days.
inHours Convert duration in hours.
inMinutes Convert duration in minutes.
inSeconds Convert duration in seconds.
inMilliseconds Convert duration in milli seconds.
inMicroseconds Convert duration in micro seconds.

DateTime Comparision Methods

If you want to compare two dates, then you can use comparison methods.

Method Name Description
IsAfter(DateTime) Returns true or false. bool
IsBefore(DateTime) Returns true or false. bool
IsAtTheSameMoment(DateTime) Returns true or false. bool 
void main() {
  DateTime myBirthday = DateTime.parse("1997-05-14");
  DateTime today = DateTime.now();

  if (myBirthday.isBefore(today)) {
    print("My Birthday is before today.");
  } else if (myBirthday.isAfter(today)) {
    print("My Birthday is after today.");
  } else if (myBirthday.isAtSameMomentAs(today)) {
    print("My Birthday date and today's date is same.");
  }
}
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