Flutter & Dart: Get a list of dates between 2 given dates

When developing applications with Flutter and Dart, there might be situations where you need to extract a list of dates between two given dates. This concise and straightforward article will show you a couple of different ways to do so.

Using a For loop

In this example, we’ll define a function named getDaysInBetween that takes 2 arguments, startDate and endDate, and returns a list of dates between them (including the bounds):

// kindacode.com
// main.dart

// define a fuction to get days in between two dates
List<DateTime> getDaysInBetween(DateTime startDate, DateTime endDate) {
  List<DateTime> days = [];
  for (int i = 0; i <= endDate.difference(startDate).inDays; i++) {
    days.add(startDate.add(Duration(days: i)));
  }
  return days;
}

// try it out
void main() {
  DateTime startDate = DateTime(2023, 4, 1);
  DateTime endDate = DateTime(2023, 4, 10);

  List<DateTime> days = getDaysInBetween(startDate, endDate);

  // print the result without time
  days.forEach((day) {
    print(day.toString().split(' ')[0]);
  });
}

Output:

2023-04-01
2023-04-02
2023-04-03
2023-04-04
2023-04-05
2023-04-06
2023-04-07
2023-04-08
2023-04-09
2023-04-10

See also: Ways to Format DateTime in Flutter

Using List.generate()

You can get a list of dates between two given dates by using the List.generate() method and pass the number of days between the start and end date as the length parameter.

Example:

// kindacode.com
// main.dart

// define a fuction to get days in between two dates
List<DateTime> getDaysInBetween(DateTime startDate, DateTime endDate) {
  final daysToGenerate = endDate.difference(startDate).inDays + 1;
  return List.generate(daysToGenerate, (i) => startDate.add(Duration(days: i)));
}

// try it out
void main() {
  DateTime startDate = DateTime(2023, 4, 1);
  DateTime endDate = DateTime(2023, 4, 5);

  List<DateTime> days = getDaysInBetween(startDate, endDate);

  // print the result without time
  days.forEach((day) {
    print(day.toString().split(' ')[0]);
  });
}

Output:

2023-04-01
2023-04-02
2023-04-03
2023-04-04
2023-04-05

That’s it. Further reading:

• How to add/remove a duration to/from a date in Dart
• How to Subtract two Dates in Flutter & Dart
• Flutter Stream.periodic: Tutorial & Example
• Flutter StreamBuilder: Tutorial & Examples (Updated)
• 2 ways to convert DateTime to time ago in Flutter
• Working with Cupertino Date Picker in Flutter

You can also tour around our Flutter topic page or Dart topic page for the most recent tutorials and examples.