Flutter & Dart: Check if a date is between 2 other dates

To check if a date is between 2 other ones in Flutter and Dart, you can use the isBefore() and isAfter() methods of the DateTime class.

Example

import 'package:flutter/foundation.dart';

DateTime dateA = DateTime(1900, 9, 14);
DateTime dateB = DateTime(2000, 10, 15);

DateTime dateC = DateTime(1984, 12, 20);
DateTime dateD = DateTime.now();

void main() {
  if (dateA.isBefore(dateC) && dateB.isAfter(dateC)) {
    debugPrint("dateC is between dateA and dateB");
  } else {
    debugPrint("dateC isn't between dateA and dateC");
  }

  if (dateA.isBefore(dateD) && dateB.isAfter(dateD)) {
    debugPrint("dateD is between dateA and dateB");
  } else {
    debugPrint("dateD isn't between dateA and dateC");
  }
}

Output:

dateC is between dateA and dateB
dateD isn't between dateA and dateC

You can find more information about the DateTime class in the official docs.

Further reading:

• Flutter: Convert UTC Time to Local Time and Vice Versa
• 2 ways to convert DateTime to time ago in Flutter
• 4 Ways to Format DateTime in Flutter
• Dart: Convert Class Instances (Objects) to Maps and Vice Versa
• How to Flatten a Nested List in Dart
• Flutter & Hive Database: CRUD Example

You can also check out our Flutter category page or Dart category page for the latest tutorials and examples.