The best open source React calendar libraries depend on what you're building. The need for a simple date picker within a booking form is naturally quite distinct than that of a team calendar application that allows the users to drag and drop events to manage their schedule.
This matters a lot because the React calendar components cater to various needs. While date pickers are designed for selecting a particular date or a range, event calendars display scheduled events and let users create, edit, or move them. Scheduling components go further with features such as recurring events, timeline views, resource allocation, and timezone handling.
Whether you are creating a project management application or an employee booking platform, the chances are that you will need more than just a date picker. The right calendar component is one that can match your needs with regard to the intended actions that the users may perform.
This guide compares six open source React calendar libraries for 2026: FullCalendar, React Big Calendar, SVAR React Calendar, Schedule-X, DayPilot Lite, and MUI X Scheduler. Each offers a different balance of functionality, customization, developer experience, and paid features in their commercial tiers.
The aim is to choose the right library for your software application.
TL;DR
If you're looking for the best open source React calendar libraries in 2026, the right choice depends on whether you need a simple event calendar or advanced features such as recurring events and resource management.
Here’s a quick overview of the six libraries covered in this guide:
- FullCalendar: A mature, feature-rich calendar with multiple views, extensive customization, and premium options for advanced scheduling.
- React Big Calendar: A MIT-licensed React calendar with familiar day, week, month, and agenda views, ideal for developers who want control over their implementation.
- SVAR React Calendar: A customizable React calendar with built-in event editing, drag-and-drop, and REST integration, plus advanced scheduling features in its PRO edition.
- Schedule-X: A modern, modular calendar with framework integrations and a plugin-based approach to additional functionality.
- DayPilot Lite: A practical option for appointment booking, staff scheduling, and resource calendars, with an Apache 2.0-licensed edition.
- MUI X Scheduler: A React scheduling component with Material UI theming, event interactions, and additional capabilities available through its Premium edition.
All six are worth evaluating, but check each library’s licensing and feature availability before choosing it for a commercial project.
How to Choose an Open Source React Calendar Library
Before comparing individual libraries, let's identify which calendar features your application needs.
A library with dozens of views and scheduling options can be useful for a complex application, but it may introduce unnecessary complexity if you only need a weekly event calendar.
Core calendar features
Start with the views and interactions your users will need most often.
- Day, week, and month views: These cover common scheduling workflows, although some applications also need an agenda or list view.
- Event management: Check whether users can create, edit, and delete events, and whether the library provides built-in editing forms or requires you to build your own.
- Drag-and-drop and resizing: These interactions make it easier to reschedule meetings and adjust event durations.
- Multiple calendars and event grouping: Useful when users manage several teams, projects, appointment types, or personal calendars.
Advanced scheduling capabilities
More demanding applications need to consider how events behave over time and how the calendar handles larger datasets.
Recurring events, timezone support, resource-based scheduling, and timeline views can become essential for applications managing staff shifts, meeting rooms, equipment, or appointments across locations.
Dynamic data loading is also worth evaluating when a calendar needs to fetch events as users navigate between dates or when the dataset grows.
I also recommend checking which features are available in the open source edition. Some libraries provide a capable free calendar while reserving advanced scheduling views or other functionality for a paid tier.
Developer experience and integration
A calendar can look impressive in a demo but still require considerable work to integrate into a real application. Check the quality of its React API, TypeScript support, documentation, customization options, and event-handling model.
You'll also need to understand how the component connects to your backend. Does it accept your existing event data?
Can you respond to edits and persist them through your API?
Does it support custom styling without extensive overrides?
Finally, consider maintenance and licensing. A MIT-licensed library, a commercial product with a free edition, and a beta component can all be reasonable choices, but they carry different trade-offs for production applications.
Now, let's look at six options and how they fit different scheduling requirements.
1. FullCalendar
FullCalendar is one of the established options for developers who need an interactive event calendar in a web application. It supports familiar calendar views, event rendering, navigation, and a range of customization options. Its official React integration makes it possible to configure the calendar through React props and customize event content with JSX.
Its modular architecture is useful when you want to add calendar views as needed. You can start with a month view, introduce a weekly schedule, and add interaction features as your application grows.
Getting started
This example uses FullCalendar v7, where the standard calendar views are imported from the React package's subpaths. The v7 package structure differs from v6, so use the matching installation command and imports.
Install the dependencies:
npm install @fullcalendar/react temporal-polyfill Create a basic calendar component:
import FullCalendar from "@fullcalendar/react"; import classicThemePlugin from "@fullcalendar/react/themes/classic"; import dayGridPlugin from "@fullcalendar/react/daygrid"; import "@fullcalendar/react/skeleton.css"; import "@fullcalendar/react/themes/classic/theme.css"; import "@fullcalendar/react/themes/classic/palette.css"; const events = [ { title: "Sprint planning", start: "2026-11-02", }, { title: "Design review", start: "2026-11-05", }, ]; export default function TeamCalendar() { return ( <FullCalendar plugins={[classicThemePlugin, dayGridPlugin]} initialView="dayGridMonth" events={events} /> ); } This gives you a month calendar populated with two events. You can add more views and interactions through the relevant plugins and configuration options.
Explore the live demos to see the calendar in action.
Key features
- Multiple calendar views: Month, week, day, and list-style views are available through the relevant plugins.
- Event interactions: Event selection, dragging, and resizing can be configured for supported views.
- Custom event rendering: React components and JSX let you control how event titles, times, and other details appear.
- External data: Events can be supplied as arrays or loaded through supported event sources.
- Framework integrations: FullCalendar provides integrations for React, Vue, Angular, Preact, and other environments.
Limitations and trade-offs
The main consideration is the distinction between Standard and Premium. The Standard packages are MIT-licensed and work well for many everyday calendar requirements. Advanced resource views and timeline functionality belong to Premium, which has separate licensing terms.
That matters if you're building a commercial scheduling product. Before committing, identify which views you need and confirm whether they are included in the edition you plan to use.
FullCalendar also has a broad configuration surface. This is useful for complex applications, although teams building a simple calendar may need time to understand its plugin system and available options.
Best for
FullCalendar is a good fit for applications that need a mature, configurable calendar with multiple views, event interactions, and a wide range of integration options. It's worth considering when your requirements are well defined and you're comfortable checking the licensing of any Premium features you need.
2. React Big Calendar
React Big Calendar is an event calendar built specifically for React. Its layout will feel familiar to anyone who has used a calendar application such as Google Calendar or Outlook. It focuses on displaying events across day, week, month, and agenda views, with a flexible data model that lets you connect your own event objects to the calendar.
One of its strengths is that the library stays close to the calendar UI itself. You provide the events, define how their start and end dates are represented, and customize the presentation to suit your application.
Getting started
Install the library and a date localizer. This example uses Day.js:
npm install react-big-calendar dayjs Create a component:
import { Calendar, dayjsLocalizer } from "react-big-calendar"; import dayjs from "dayjs"; import "react-big-calendar/lib/css/react-big-calendar.css"; const localizer = dayjsLocalizer(dayjs); const events = [ { title: "Sprint planning", start: new Date(2026, 10, 2, 10, 0), end: new Date(2026, 10, 2, 11, 0), }, { title: "Client meeting", start: new Date(2026, 10, 4, 14, 0), end: new Date(2026, 10, 4, 15, 0), }, ]; export default function TeamCalendar() { return ( <div style={{ height: 600 }}> <Calendar localizer={localizer} events={events} startAccessor="start" endAccessor="end" titleAccessor="title" defaultView="week" /> </div> ); } The localizer handles date formatting and calendar-related date operations. The startAccessor and endAccessor tell the component which fields to read from each event. Notice the container's explicit height: React Big Calendar needs a defined height for its calendar layout to display correctly.
Key features
- Familiar calendar views: Day, week, month, and agenda layouts cover common scheduling workflows.
- Flexible event data: Accessor properties let you map the calendar to your application's existing event structure.
- Date localization: Integrations with libraries such as Day.js, date-fns, and Moment support date formatting and localization.
- Custom styling: CSS and Sass variables provide control over colors, spacing, and other visual details.
- Drag-and-drop support: An optional add-on supports moving and resizing events, with additional setup required.
Limitations and trade-offs
React Big Calendar is a good option for traditional event-calendar interfaces, but you'll need to evaluate how much of the surrounding scheduling experience your application requires.
The core component doesn't automatically provide a complete booking workflow with backend persistence, business rules, or a ready-made event editor. Those pieces usually need to be implemented in your application. Drag-and-drop also requires configuring its add-on and handling the resulting event changes.
Styling deserves attention, too. The library includes standard CSS and Sass customization options, but extensive overrides can affect the layout, so custom themes should be tested across the calendar's different views.
Best for
React Big Calendar works well for React applications that need a conventional calendar UI, flexible event data, and control over the surrounding experience. It's a sensible choice for internal dashboards, team calendars, and scheduling interfaces where your team is happy to implement its own event forms and application-specific logic.
3. SVAR React Calendar
SVAR React Calendar is a React calendar library that integrates natively into React applications that need more than a basic date grid. It provides calendar views, event interactions, and built-in editing capabilities, making it worth considering for scheduling interfaces in SaaS products, internal dashboards, and business applications.
A useful aspect of SVAR is its approach to event management. Developers can display events, let users move them with drag-and-drop, and edit details through a built-in form with rich text and file attachments. That gives you a starting point for an interactive scheduling experience without building every calendar interaction from scratch.
The library also offers a separate PRO edition for applications that need more advanced scheduling features, including editable recurring events, timezone support, dynamic loading, and export to PDF, PNG, and Excel. Teams can start with the MIT-licensed core and adopt additional functionality as their requirements grow. The exact edition you need depends on which views and scheduling capabilities your application requires.
Getting started
Install the React Calendar package:
npm install @svar-ui/react-calendar You can then render a calendar with a small collection of events:
import { Calendar, Willow } from "@svar-ui/react-calendar"; const date = new Date(2026, 10, 2); const events = [ { id: 1, start: new Date(2026, 10, 2, 10, 0), end: new Date(2026, 10, 2, 11, 0), text: "Sprint planning", }, { id: 2, start: new Date(2026, 10, 4, 14, 0), end: new Date(2026, 10, 4, 15, 0), text: "Client meeting", }, ]; export default function TeamCalendar() { return ( <Willow> <Calendar events={events} date={date} /> </Willow> ); } The Willow wrapper supplies the CSS variables the calendar needs for its default styling. The date prop sets the initially displayed date, while each event uses a unique id, start, and end value, along with a text label for its title. The event dates must be JavaScript Date objects; ISO date strings won't render correctly in this example.
Before using the snippet in a production application, verify the exact event schema and component API against the official guide, especially if you're working with a different package version.
Explore the live demo to see the calendar in action.
Key features
- Day, week, and month views with event interactions: The open source component supports core calendar workflows, including displaying events, moving them through drag-and-drop, and editing event details with its built-in form.
- Calendar grouping and event filtering: Applications that manage multiple teams, event types, or schedules can use grouping and filtering capabilities to help users find the information relevant to them.
- React and TypeScript integration: The component is built for React and supports TypeScript-based development, making it a natural candidate for projects that already use typed event models and reusable React components.
- Backend integration: SVAR provides a
RestDataProviderfor connecting calendar data to a server. This helps developers integrate event loading and persistence into applications that use REST APIs. - Customization and theming: CSS-variable-based theming allows developers to adapt the calendar's appearance to their application's visual design.
- Advanced scheduling through PRO: The separate PRO edition adds capabilities such as recurring events, dynamic data loading, timezone support, and Timeline, Agenda, Year, and Resource views.
For implementation details, check the server integration.
Limitations and trade-offs
SVAR's free edition covers the core calendar experience, including Day, Week, and Month views, event editing, drag-and-drop, theming, and backend wiring. However, recurring events, Timeline, Agenda, Year, and Resource views, as well as dynamic loading and timezone projection support, are part of the commercial PRO edition.
That matters if you're comparing free React calendar libraries for a production application. You can build a useful scheduling interface with the MIT edition, but you'll need to budget for PRO if your requirements include those advanced capabilities.
The backend helper also doesn't remove the need for application-level engineering. You'll still need to configure your endpoints, handle permissions, validate event changes, and make sure the server's scheduling rules are enforced.
Best for
SVAR React Calendar is a good choice for developers who want a customizable event calendar with built-in editing, drag-and-drop, and a straightforward React integration. It's especially worth evaluating if you expect your scheduling requirements to grow and want the option of adding recurring events, resource scheduling, or timeline views later.
4. Schedule-X
Schedule-X is a calendar library designed around a clean interface, modular configuration, and framework integrations. It supports common calendar views and lets developers extend the core experience with plugins when their applications need additional behavior.
Schedule-X has a plugin-based approach. The basic calendar can handle event display and navigation, while capabilities such as drag-and-drop may require separate premium plugins. That gives developers control over which features they add, but it also means you need to check the licensing and setup requirements for each plugin before choosing it.
Schedule-X provides integration guides for React, Vue, Angular, Svelte, and Preact, which make an option for teams working across different frontend frameworks.
Getting started
Install the calendar, its default theme, and the required Temporal polyfill:
npm install @schedule-x/react @schedule-x/calendar @schedule-x/theme-default temporal-polyfill A basic React integration looks like this:
import { useCalendarApp, ScheduleXCalendar } from "@schedule-x/react"; import { createViewDay, createViewWeek, createViewMonthGrid, } from "@schedule-x/calendar"; import "temporal-polyfill/global"; import "@schedule-x/theme-default/dist/index.css"; export default function TeamCalendar() { const calendar = useCalendarApp({ selectedDate: "2026-11-02", views: [ createViewDay(), createViewWeek(), createViewMonthGrid(), ], events: [ { id: "1", title: "Sprint planning", start: "2026-11-02 10:00", end: "2026-11-02 11:00", }, { id: "2", title: "Client meeting", start: "2026-11-04 14:00", end: "2026-11-04 15:00", }, ], }); return <ScheduleXCalendar calendarApp={calendar} />; } This example uses Schedule-X's React integration. The useCalendarApp hook configures the calendar, while ScheduleXCalendar renders it in the component tree. The selected date, available views, and event data are passed into the calendar configuration, and the Temporal polyfill is imported as required by the current setup.
Key features
- Multiple calendar views: Schedule-X supports calendar layouts for different ways of planning and reviewing events. The views you enable depend on your configuration and installed packages.
- Modular plugins: You can extend the calendar with additional functionality when your project needs it.
- Custom event presentation: Event properties and styling options let you adapt the calendar to your application's visual design.
- Framework integrations: Official guides cover React, Vue, Angular, Svelte, and Preact.
- Event interaction: The library supports event-related interactions, although you should check whether a specific interaction comes with the core package or requires a premium plugin.
Limitations and trade-offs
The main consideration is feature availability across the core library and its plugins. For example, Schedule-X's drag-and-drop plugin is a premium add-on that requires an active license. If moving events directly on the calendar is essential to your application, include that cost in your evaluation.
The setup also differs from a typical React component that you render directly in JSX. Schedule-X creates a calendar instance and renders it into a DOM element, so you'll need to manage its lifecycle carefully when integrating it with React.
This approach can work well, but developers should evaluate the library's configuration model, plugin requirements, and licensing before committing to it for a larger application.
Best for
Schedule-X is worth considering if you want a modern-looking calendar, prefer modular functionality, and need integrations across frontend frameworks. It may be a good fit for teams that are comfortable managing a calendar instance and selecting plugins according to their requirements.
5. DayPilot Lite
DayPilot Lite is a JavaScript library for building interactive calendars and scheduling interfaces. Its components include a day/week Calendar, a monthly calendar, a resource Scheduler with a horizontal timeline, and a date Navigator. It's useful for applications that need more than a basic calendar, including appointment booking, room reservations, staff scheduling, and equipment management.
DayPilot supports plain JavaScript and TypeScript, with framework-specific packages for React, Angular, and Vue. Its Lite edition is released under the Apache 2.0, which permits use in personal and commercial projects. DayPilot also offers a commercial Pro edition, so developers should check the feature matrix to confirm which edition includes the functionality their application requires.
Getting started
For a plain JavaScript project, install the open-source package:
npm install @daypilot/daypilot-lite-javascript Create an HTML element to host the calendar:
<div id="calendar"></div> Then initialize the calendar and provide a few events:
import { DayPilot } from "@daypilot/daypilot-lite-javascript"; const calendar = new DayPilot.Calendar("calendar", { viewType: "Week", }); calendar.init(); const events = [ { id: 1, text: "Sprint planning", start: "2026-11-02T10:00:00", end: "2026-11-02T11:00:00", }, { id: 2, text: "Client meeting", start: "2026-11-04T14:00:00", end: "2026-11-04T15:00:00", }, ]; calendar.update({ events }); This example initializes DayPilot Lite's JavaScript Calendar in week view and loads two events. The start and end values define each event's scheduled time, while text provides the label displayed on the calendar. The same Lite package also includes separate Scheduler, Month, and Navigator components.
Explore the live demos to see the calendar in action.
Key features
- Multiple calendar components: Choose from day and week calendars, a monthly view, a resource calendar, and a date navigator.
- Drag-and-drop scheduling: Users can create, move, resize, and copy events directly on the calendar.
- Resource management: Display people, rooms, equipment, or other resources as columns in a calendar or rows on a horizontal timeline in the Scheduler.
- Custom styling: Adjust event appearance, calendar cells, headers, business hours, and themes to match the application's interface.
- Scheduling controls: Support read-only modes, locked events, disabled time slots, and overlap handling through event configuration and handlers.
- Framework support: Use DayPilot Lite in JavaScript, TypeScript, React, Angular, or Vue projects, with TypeScript definitions and downloadable examples available.
Limitations and trade-offs
DayPilot Lite is a scheduling component library, not a complete booking backend. Your application still needs to handle data persistence, authentication, permissions, and any server-side availability rules. Some advanced capabilities are exclusive to DayPilot Pro.
There is also a distinction worth noting for React developers: DayPilot provides a dedicated React package, but its core offering is a set of calendar and scheduling components available across several frameworks. Teams looking for a React-only calendar API may prefer a library designed specifically around React conventions.
Best for
DayPilot Lite is good for developers building appointment booking, staff or equipment scheduling, resource calendars, and other applications that need interactive calendar components across JavaScript frameworks.
6. MUI X Scheduler
MUI X Scheduler is part of the MUI X family of React components. It provides event-calendar functionality for applications that need interactive scheduling within a React-based interface.
For teams already using Material UI, this is a natural option to evaluate because it follows the same broader design-system approach. You can use familiar theming tools and integrate the scheduler into an application that already relies on MUI components.
The current offering includes a Community event calendar under the MIT license and a Premium edition with additional scheduling capabilities. The Community edition includes multiple views, resource support, drag-and-drop, resizing, and theming. Premium adds features such as recurring events, exception dates, lazy loading through data sources, and an event timeline.
Getting started
Install the Community scheduler package and its Material UI dependencies:
npm install @mui/x-scheduler @mui/material @emotion/react @emotion/styled MUI X Scheduler's API can evolve, so use the current quick-start documentation for the exact component exports and event types. A basic integration follows this pattern:
import { useState } from "react"; import { EventCalendar } from "@mui/x-scheduler/event-calendar"; import { SchedulerEvent } from "@mui/x-scheduler/models"; const initialEvents: SchedulerEvent[] = Source：https://dev.to/hadil/best-open-source-react-calendar-libraries-for-scheduling-in-2026-4h11Related posts
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