import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        datePickerTheme: DatePickerThemeData(
          todayBorder: BorderSide(color: Colors.red),
          todayForegroundColor: WidgetStateProperty.all(Colors.blue),
          todayBackgroundColor: WidgetStateProperty.all(Colors.white),
        ),
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      ),
      home: Scaffold(
        body: Center(
          child: CalendarDatePicker(
            initialDate: DateTime.now(),
            firstDate: DateTime(1900),
            lastDate: DateTime(2100),
            onDateChanged: (DateTime value) {},
          ),
        ),
      ),
    );
  }
}