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CalendarPicker

A modern, customizable Flutter calendar picker with horizontal timeline, single/multi-date selection, date ranges, and extensive customization options for 2026 Flutter standards.

✨ Features

• Horizontal Timeline Calendar - Smooth horizontal scrolling calendar
• Multiple Selection Modes - Single, multiple, and range date selection
• Date Restrictions - Min/Max dates, disabled dates, blackout dates
• Visual Enhancements - Today highlighting, weekend highlighting
• Infinite Scrolling - Optional infinite horizontal scrolling
• Swipe Navigation - Touch-friendly navigation
• Custom First Day of Week - Configurable week start
• Full Customization - Colors, typography, spacing, decorations
• RTL Support - Right-to-left language support
• Full Locale Support - Internationalization ready
• Accessibility - Screen reader support, keyboard navigation
• Material 3 Support - Modern design system integration
• Dark Mode - Built-in dark theme support
• Performance Optimized - Smooth scrolling, efficient rendering

📸 Screenshots

Single Date Selection

Multiple Date Selection

Date Range Selection

Custom Styling

🚀 Quick Start

Installation

Add to your pubspec.yaml:

dependencies:
  calender_picker: ^3.0.0

Basic Usage

import 'package:calender_picker/calender_picker.dart';

CalendarPicker(
  selectionMode: CalendarSelectionMode.single,
  onDateSelected: (date) {
    print('Selected: $date');
  },
)

📖 Usage Examples

Single Date Selection

CalendarPicker(
  selectionMode: CalendarSelectionMode.single,
  initialSelection: CalendarSelection.single(DateTime.now()),
  config: const CalendarConfig(
    locale: 'en_US',
    highlightToday: true,
    highlightWeekends: true,
  ),
  onDateSelected: (date) {
    print('Selected date: $date');
  },
)

Multiple Date Selection

CalendarPicker(
  selectionMode: CalendarSelectionMode.multiple,
  config: const CalendarConfig(
    activeDates: [DateTime(2024, 1, 15), DateTime(2024, 1, 20)],
  ),
  onDatesSelected: (dates) {
    print('Selected dates: $dates');
  },
)

Date Range Selection

CalendarPicker(
  selectionMode: CalendarSelectionMode.range,
  config: const CalendarConfig(
    minDate: DateTime(2024, 1, 1),
    maxDate: DateTime(2024, 12, 31),
  ),
  onRangeSelected: (start, end) {
    if (start != null && end != null) {
      print('Selected range: $start to $end');
    }
  },
)

Custom Styling

CalendarPicker(
  style: CalendarStyle(
    selectedColor: Colors.blue,
    todayColor: Colors.orange,
    weekendColor: Colors.red.shade100,
    selectedTextStyle: const TextStyle(
      color: Colors.white,
      fontWeight: FontWeight.bold,
    ),
  ),
  onDateSelected: (date) {
    // Handle selection
  },
)

Dark Mode

CalendarPicker(
  style: CalendarStyle.dark(),
  // ... other properties
)

Material 3

CalendarPicker(
  style: CalendarStyle.material3(),
  // ... other properties
)

Using Controller

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  final CalendarController _controller = CalendarController();

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        CalendarPicker(
          controller: _controller,
          selectionMode: CalendarSelectionMode.multiple,
        ),
        ElevatedButton(
          onPressed: () {
            _controller.clearSelection();
          },
          child: const Text('Clear Selection'),
        ),
      ],
    );
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }
}

🎨 Customization

CalendarConfig

CalendarConfig(
  startDate: DateTime.now(),
  minDate: DateTime(2024, 1, 1),
  maxDate: DateTime(2024, 12, 31),
  disabledDates: [DateTime(2024, 1, 15)],
  activeDates: [DateTime(2024, 1, 20)],
  firstDayOfWeek: 1, // Monday
  locale: 'en_US',
  enableInfiniteScroll: true,
  daysCount: 365,
  highlightToday: true,
  highlightWeekends: true,
  enableSwipeNavigation: true,
  showMonthHeaders: true,
  height: 80,
  itemWidth: 60,
  itemSpacing: 4,
)

CalendarStyle

CalendarStyle(
  // Colors
  backgroundColor: Colors.white,
  selectedColor: Colors.blue,
  todayColor: Colors.orange,
  weekendColor: Colors.red.shade100,
  disabledColor: Colors.grey.shade300,

  // Text styles
  dayTextStyle: const TextStyle(fontSize: 11, fontWeight: FontWeight.w500),
  dateTextStyle: const TextStyle(fontSize: 24, fontSize: FontWeight.w600),
  monthTextStyle: const TextStyle(fontSize: 11, fontWeight: FontWeight.w500),

  // Decorations
  selectedDecoration: BoxDecoration(
    color: Colors.blue,
    borderRadius: BorderRadius.circular(25),
  ),

  // Spacing
  itemPadding: const EdgeInsets.all(8),
  itemBorderRadius: 25,
)

🔧 API Reference

CalendarPicker

Property	Type	Description
selectionMode	CalendarSelectionMode	Selection mode (single/multiple/range)
initialSelection	CalendarSelection?	Initial selection state
config	CalendarConfig	Calendar configuration
style	CalendarStyle?	Visual styling
controller	CalendarController?	Optional controller
onDateSelected	ValueChanged<DateTime>?	Single date selection callback
onDatesSelected	ValueChanged<List<DateTime>>?	Multiple dates selection callback
onRangeSelected	Function(DateTime?, DateTime?)?	Range selection callback
onMonthChanged	ValueChanged<DateTime>?	Month change callback
onDisabledDateTap	ValueChanged<DateTime>?	Disabled date tap callback

CalendarController

Method	Description
selectDate(DateTime)	Select a single date
toggleDate(DateTime)	Toggle date in multi-selection
selectDates(List<DateTime>)	Set multiple dates
selectRange(DateTime?, DateTime?)	Set date range
clearSelection()	Clear all selections
dispose()	Dispose controller

🌍 Localization

The package supports full internationalization:

CalendarPicker(
  config: const CalendarConfig(
    locale: 'es_ES', // Spanish
  ),
)

Supported locales depend on the intl package. Make sure to initialize date formatting:

import 'package:intl/date_symbol_data_local.dart';

void main() async {
  await initializeDateFormatting('es_ES', null);
  runApp(MyApp());
}

♿ Accessibility

The calendar includes comprehensive accessibility features:

• Screen reader support with descriptive labels
• Keyboard navigation
• High contrast support
• Semantic markup
• Focus management

🧪 Testing

Run tests:

flutter test

Run example app:

cd example
flutter run

📋 Migration Guide

From v2.x to v3.0

1. Update pubspec.yaml:

   dependencies:
     calender_picker: ^3.0.0
   

2. Update imports:

   // Old
   import 'package:calender_picker/calender_picker.dart';
   CalenderPicker(...)
   
   // New
   import 'package:calender_picker/calender_picker.dart';
   CalendarPicker(...)
   

3. Update constructor:

   // Old
   CalenderPicker(
     DateTime.now(),
     enableMultiSelection: true,
     onDateChange: (date) => print(date),
   )
   
   // New
   CalendarPicker(
     selectionMode: CalendarSelectionMode.multiple,
     onDatesSelected: (dates) => print(dates),
   )
   

4. Update styling:

   // Old
   CalenderPicker(
     selectionColor: Colors.blue,
     selectedTextColor: Colors.white,
   )
   
   // New
   CalendarPicker(
     style: const CalendarStyle(
       selectedColor: Colors.blue,
       selectedDayTextStyle: TextStyle(color: Colors.white),
       selectedDateTextStyle: TextStyle(color: Colors.white),
     ),
   )
   

📋 Version History

Version	Date	Highlights
3.0.2	2026-05-11	Version bump to 3.0.2 (3.0.1 already published); enhanced README version history with detailed entries for all releases
3.0.1	2026-05-11	Fixed screenshot references to use correct .jpg files; switched images to GitHub raw URLs for pub.dev display; updated GitHub URLs to correct repository
3.0.0	2026-05-11	Major rewrite: Modern architecture, multiple selection modes (single/multi/range), Material 3, dark mode, accessibility, RTL support, controller pattern, performance optimizations
2.0.2	2023-12-21	Dependencies upgraded
2.0.1	2023-03-24	Screenshots added
2.0.0	2023-03-24	Fixed date scroll issue, upgraded to Flutter 3.0
1.0.7	2021-11-29	Date format fixes
1.0.6	2021-11-27	Date format fixes
1.0.5	2021-11-27	Day format issues fixed
1.0.4	2021-11-27	State management problems fixed
1.0.3	2021-11-27	Removed debug print statements
1.0.2	2021-10-13	Added multi-date selection listener function
1.0.1	2021-10-08	Screenshots added
1.0.0	2021-10-08	Alignment problems fixed
0.0.4	2021-10-07	Screenshots added
0.0.3	2021-10-07	Initial screenshots added
0.0.2	2021-10-06	Basic functionality, updated Readme, multi-select date option, removed time from selected date
0.0.1	2021-10-05	Initial release

🤝 Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests
5. Submit a pull request

📄 License

MIT License - see LICENSE file.

🙏 Acknowledgments

• Built with Flutter
• Uses intl for internationalization
• Inspired by modern calendar interfaces

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Made with ❤️ for the Flutter community