# How to Create a Calendar View in FlutterFlow

- Tool: FlutterFlow
- Difficulty: Beginner
- Time required: 20-30 min
- Compatibility: FlutterFlow Free+
- Last updated: March 2026

## TL;DR

Build a standalone calendar Component using the table_calendar Custom Widget with three view modes: month, two-week, and week. Query events by the visible date range and map them to calendar days as colored dots. Tapping a day opens a Bottom Sheet listing that day's events. Swipe left and right to navigate months. Style the calendar with FlutterFlowTheme colors for the header, selected day, today highlight, and event dots. Accept events as a Component Parameter for flexible embedding across different pages.

## Building a Reusable Calendar View Component in FlutterFlow

A calendar view is a foundational component for booking apps, event platforms, scheduling tools, and personal productivity apps. This tutorial builds a standalone calendar Component using the table_calendar package that supports month, two-week, and week views, displays event dots, and opens a detail sheet on day tap. It is designed as a reusable Component you can embed on any page.

## Before you start

- A FlutterFlow project with Firestore configured
- The table_calendar package added as a Custom Widget dependency
- An events or similar collection in Firestore with date fields
- Basic familiarity with FlutterFlow Custom Widgets and Component Parameters

## Step-by-step guide

### 1. Set up the Custom Widget with table_calendar

Create a Custom Widget CalendarView that imports the table_calendar package. Accept Component Parameters: events (List of Maps with 'date' DateTime and 'title' String), onDaySelected (callback with DateTime), initialFormat (String: 'month', 'twoWeeks', 'week'). Inside the widget, create a TableCalendar instance with firstDay set to one year ago, lastDay set to one year from now, and focusedDay set to today. Map the CalendarFormat enum based on initialFormat. Use a StatefulWidget to track focusedDay, selectedDay, and calendarFormat in local state.

```
// Custom Widget: CalendarView
import 'package:table_calendar/table_calendar.dart';

class CalendarView extends StatefulWidget {
  final List<Map<String, dynamic>> events;
  final Function(DateTime) onDaySelected;
  const CalendarView({
    required this.events,
    required this.onDaySelected,
  });

  @override
  State<CalendarView> createState() => _CalendarViewState();
}

class _CalendarViewState extends State<CalendarView> {
  CalendarFormat _format = CalendarFormat.month;
  DateTime _focused = DateTime.now();
  DateTime? _selected;

  List<Map<String, dynamic>> _getEventsForDay(DateTime day) {
    return widget.events.where((e) {
      final d = e['date'] as DateTime;
      return d.year == day.year &&
          d.month == day.month &&
          d.day == day.day;
    }).toList();
  }

  @override
  Widget build(BuildContext context) {
    return TableCalendar(
      firstDay: DateTime.now().subtract(Duration(days: 365)),
      lastDay: DateTime.now().add(Duration(days: 365)),
      focusedDay: _focused,
      calendarFormat: _format,
      selectedDayPredicate: (d) => isSameDay(_selected, d),
      onDaySelected: (selected, focused) {
        setState(() {
          _selected = selected;
          _focused = focused;
        });
        widget.onDaySelected(selected);
      },
      onFormatChanged: (f) => setState(() => _format = f),
      onPageChanged: (f) => setState(() => _focused = f),
      eventLoader: _getEventsForDay,
    );
  }
}
```

**Expected result:** A Custom Widget renders the table_calendar with month view, navigation, and event loading.

### 2. Style the calendar with FlutterFlowTheme colors

Add CalendarStyle and HeaderStyle properties to the TableCalendar. Set todayDecoration to a CircleDecoration with FlutterFlowTheme primaryColor at 30% opacity. Set selectedDecoration to a CircleDecoration with solid primaryColor. Set markerDecoration (event dots) to small CircleDecoration with secondary color. For the header, set formatButtonDecoration with a rounded border, titleTextStyle with headlineSmall, and left/right arrow colors matching the theme. Set weekendTextStyle to use a muted color. Set outsideDaysVisible to false to keep the calendar clean. These styles ensure the calendar matches your app's design system.

**Expected result:** The calendar is styled with your app's theme colors for a cohesive look.

### 3. Query events by visible date range from Firestore

On the page embedding the CalendarView Component, create a Backend Query on your events collection. Filter where date >= first day of current month AND date <= last day of current month. Pass the query results to the CalendarView Component Parameter events as a list of Maps. When the user navigates to a different month (onPageChanged callback), update the query date range. To minimize re-queries, load events for the current month plus one month before and after (three-month window). Store the loaded events in Page State and only re-query when the user navigates outside the loaded range.

**Expected result:** Events for the visible month load from Firestore and display as dots on the calendar.

### 4. Display event dots on calendar days

The eventLoader property on TableCalendar returns events for each day. The calendar automatically renders marker dots below each day that has events. Customize the markers: use calendarBuilders.markerBuilder to create custom dot widgets. Show 1 dot for 1 event, 2 dots for 2 events, and 3 dots with a '+' for more than 3 events. Color-code dots by event category: blue for meetings, green for personal, red for deadlines. Create a Row of small Container circles (8x8 pixels) with the appropriate colors. Limit to 3 visible dots per day to keep the calendar clean.

**Expected result:** Calendar days show color-coded event dots indicating the number and type of events.

### 5. Show day events in a Bottom Sheet on tap

When the user taps a calendar day, the onDaySelected callback fires. In FlutterFlow, connect this callback to show a Bottom Sheet DayEventsSheet Component. Pass the selected date and filtered events for that day as Component Parameters. Inside the Bottom Sheet, display: the date as a formatted heading Text, a ListView of events for that day (each showing: colored dot Container matching the event category, title Text, time Text, and a brief description). If no events exist for the tapped day, show an empty state with 'No events' Text and an 'Add Event' Button. Add a Today IconButton in the calendar header that resets focusedDay to DateTime.now().

**Expected result:** Tapping a calendar day opens a Bottom Sheet listing all events for that day with category colors.

## Complete code example

File: `FlutterFlow Calendar View Setup`

```text
PACKAGE REQUIRED:
  table_calendar: ^3.0.0

FIRESTORE DATA MODEL:
  events/{eventId}
    title: String
    description: String
    date: Timestamp
    endDate: Timestamp (optional)
    category: String
    userId: String

CUSTOM WIDGET: CalendarView
  Component Parameters:
    events: List<Map> [{date, title, category}]
    onDaySelected: Callback(DateTime)

  TableCalendar(
    firstDay: 1 year ago
    lastDay: 1 year from now
    focusedDay: state._focused
    calendarFormat: state._format (month/twoWeeks/week)
    selectedDayPredicate: isSameDay(_selected, day)
    onDaySelected: update _selected, call callback
    onFormatChanged: update _format
    onPageChanged: update _focused
    eventLoader: _getEventsForDay
    calendarStyle:
      todayDecoration: primary 30% opacity circle
      selectedDecoration: primary solid circle
      markerDecoration: secondary small circles
    headerStyle:
      formatButtonDecoration: rounded border
      titleTextStyle: headlineSmall
  )

EVENT DOTS:
  calendarBuilders.markerBuilder:
    Row of up to 3 colored Container circles (8x8)
    Blue = meeting, Green = personal, Red = deadline
    More than 3: show 3 dots + text

DAY EVENTS BOTTOM SHEET:
  Column
    ├── Text (formatted date, headlineMedium)
    ├── ListView (events for selected day)
    │     └── Row
    │           ├── Container (category dot, colored)
    │           ├── Column
    │           │     ├── Text (title)
    │           │     └── Text (time, small)
    │           └── Icon (chevron right)
    └── Empty State (if no events)
          Text ("No events")
          Button ("Add Event")

QUERY STRATEGY:
  Load events for current month +/- 1 month
  Re-query on onPageChanged when outside loaded range
  Store loaded events in Page State
```

## Common mistakes

- **Loading all events for the entire year in the initial query** — A user with hundreds of events would load all documents at once, causing slow rendering and high Firestore read costs. Most of these events are not visible on the current month view. Fix: Query only the visible month range (plus one month buffer on each side). Use the onPageChanged callback to load new events when the user navigates to a different month.
- **Not handling the onPageChanged callback to update the event query** — When the user swipes to a new month, the calendar shows no events because the query is still filtered to the original month. The dots disappear. Fix: Listen to onPageChanged, update the focusedDay state, and trigger a new Backend Query for the new visible date range. Update the events Component Parameter with the new results.
- **Using Conditional Visibility toggling instead of TableCalendar for the calendar grid** — Building a calendar grid manually with rows of Containers and Conditional Visibility for each day is extremely complex, error-prone, and cannot handle month transitions, leap years, or week start variations. Fix: Use the table_calendar package as a Custom Widget. It handles all date math, layout, navigation, and accessibility out of the box.

## Best practices

- Use the table_calendar package for reliable date handling and calendar layout
- Query events by visible date range only, not the entire collection
- Re-query events on month navigation using the onPageChanged callback
- Color-code event dots by category for quick visual scanning
- Limit visible dots to 3 per day to keep the calendar layout clean
- Style the calendar using FlutterFlowTheme colors for design consistency
- Accept events as a Component Parameter so the calendar can be reused on different pages with different data sources

## Frequently asked questions

### Can I add the ability to create events directly from the calendar?

Yes. When the user taps a day with no events, show an 'Add Event' button in the Bottom Sheet. Tapping it opens an event creation form pre-filled with the selected date. On save, create the event document in Firestore and refresh the calendar events.

### How do I show multi-day events that span across several days?

Add a startDate and endDate to each event. In the eventLoader, check if each day falls within the start-end range of any event. Use calendarBuilders to draw a background highlight spanning the date range instead of individual dots.

### Can I make the calendar start on Monday instead of Sunday?

Yes. Set the startingDayOfWeek property on TableCalendar to StartingDayOfWeek.monday. This shifts the entire grid so Monday appears in the first column.

### How do I sync with Google Calendar or Apple Calendar?

Use the Google Calendar API or Apple EventKit via a Cloud Function. Fetch external calendar events and either import them into your Firestore events collection or merge them at display time in the eventLoader function.

### Can I add drag-and-drop to reschedule events?

The table_calendar package does not support drag-and-drop natively. For event rescheduling, use a long-press gesture on an event in the Bottom Sheet list, then show a date picker to select the new date and update the Firestore document.

### Can RapidDev help build an advanced calendar system?

Yes. RapidDev can implement a full calendar system with recurring events, drag-and-drop rescheduling, Google Calendar sync, time zone handling, availability management, and team calendar views.

---

Source: https://www.rapidevelopers.com/flutterflow-tutorials/how-to-create-a-calendar-view-in-flutterflow
© RapidDev — https://www.rapidevelopers.com/flutterflow-tutorials/how-to-create-a-calendar-view-in-flutterflow