Flutter App : A Flutter Calendar Slider widget with a lot of customization

dependencies:
  flutter:
    sdk: flutter
  calendar_slider: version

flutter pub get calendar_slider

import 'package:calendar_slider/calendar_slider.dart';

CalendarAgenda(
initialDate: DateTime.now(),
firstDate: DateTime.now().subtract(Duration(days: 140)),
lastDate: DateTime.now().add(Duration(days: 4)),
onDateSelected: (date) {
print(date);
},
)