11 Best Open Source Free JavaScript Calendars

11 Best Open Source Free JavaScript Calendars

As a developer, choosing the right library is always a tricky one. Not just because there are dozens of options, but also because many variables at play here.

Most importantly, does the library features matches with your current project requirements or not.

22 Open-source Free Date, Clock, Date Picker and Calendar JavaScript Libraries for React
Datepicker and calendar JavaScript libraries are open-source tools that developers can use to add date and time selection functionality to their web applications. These libraries provide pre-built components that can be easily integrated into a project, saving time and effort. The libraries mentione…

Calendar libraries are demanded by many developers, here in the post, we offer you the best JavaScript based calendar library and projects.

However, you may also check our most prime calendar related posts:

1- Full Calendar

Creating a feature rich calendar is no longer a daunting task. Thanks to libraries like FullCalendar.js, web developers can integrate powerful, customizable calendars into their web applications with ease.

AdminMart brings you the possibility of creating beautiful FullJS calendars that simplifies the process of building dynamic and responsive calendars, making it a popular choice for a wide range of web projects.

Modernize Admin Dashboard Template is having Full Calendar and too many other applications, dashboards, page templates and much more.

Modernize Bootstrap template brings you responsive design, extensibility, event management, option to populate data, project management, scheduling resources and more. It also includes 3+ high quality dashboard design, Email Application, Chat Application, Kanban Application design, 50+ Page Templates and much more to build any web application with ese.

Features rich and easy to use in app development makes this template so popular among developers. Its versatility and ease of integration make it a valuable tool for various industries and use cases. 

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2- Calendar.js

Calendar.js is a simple yet full-featured responsive JavaScript calendar app and library. You can use it as a simple calendar on your desktop or your server as a self-hosted app.

Calendar.js comes packed with dozens of features, but the most important feature is the ability to import and export your events from other calendars.

Calendar.js: May be the Best Web-based Calendar yet
A drag & drop event calendar (for Javascript), that is fully responsive and compatible with all modern browsers.

3- TUI Calendar

The TUI Calendar library is a part of an open-source enterprise-grade JavaScript library collection that built to aid developers in building rich interactive apps.

It features a developer friendly API and a rich documentation with many useful demos.

You can create a schedule, add tasks, change timezone, and customize your theme easily. The library also enables you to choose between different view modes that include monthly, weekly, daily, 2 weeks, 3 weeks and no weekend view mode.

Calendar
The Calendar supports monthly, weekly, daily views and more, and you can create or edit your event with a simple dragging motion.

4- jsCalendar

The jsCalendar is a simple lightweight calendar library that can be easily integrated with any web app. It features a simple interface, a rich documentation, multi-languages support, and multiple theme options.

If your required language is not included, you can easily add a new language.

It can be used as a date picker, or integrated in any project to manage, edit, and export events.

GitHub - GramThanos/jsCalendar: Just a simple javascript calendar
Just a simple javascript calendar. Contribute to GramThanos/jsCalendar development by creating an account on GitHub.

5- Event Calendar

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The Event Calendar library is an open source calendar with drag-and-drop support that can be an ideal alternative for the FullCalendar library. It offers a Sevlte components with ES6 module support, works seamlessly within all modern browser, and plays well with other libraries as React, Vue, and Angular.

It is important to note, that unlike other libraries, Event calendar is a lightweight, (37kb compressed) library, with zero-dependency. If you are looking for a FullCalendar option with similar options and API, then the Event Calendar library is a great option.

GitHub - vkurko/calendar: Full-sized drag & drop JavaScript event calendar with resource view
Full-sized drag & drop JavaScript event calendar with resource view - GitHub - vkurko/calendar: Full-sized drag & drop JavaScript event calendar with resource view

6- Caleandar

Caleandar is a lightweight (about 7.5kb minified at the time of writing) and library-independent calendar script with optional themes. You can add events to the calendar and add functionality on click of the event.

GitHub - jackducasse/caleandar: A lightweight, library independent JavaScript calendar
A lightweight, library independent JavaScript calendar - GitHub - jackducasse/caleandar: A lightweight, library independent JavaScript calendar

7-Evo Calendar

The Evo Calendar is a feature-rich calendar library and app which is ready to integrate with any JavaScript app.

Evo Calendar feature highlight

  • Flexible and fully customizable
  • Responsive Calendar (desktop, tablet and mobile)
  • Add, Remove and View single/multiple calendar events
  • Set event type (event, holiday, birthday)
  • Events and methods that let you think outside the box!
GitHub - edlynvillegas/evo-calendar: Simple modern-looking event calendar 📅💜
Simple modern-looking event calendar 📅💜. Contribute to edlynvillegas/evo-calendar development by creating an account on GitHub.

8- CalenStyle - Event Calendar

CalenStyle is a Responsive jQuery Drag & Drop Event Calendar Library for Web, Mobile Sites, Android, iOS & Windows Phone. It can be used in web apps, responsive mobile websites, and hybrid mobile apps.

CalenStyle library allows developers to create planners, timeline agenda apps, date-time pickers, and a full calendar apps.

It features dozens of methods, styles, and customization options which makes it ideal for creating mobile apps.

GitHub - nehakadam/CalenStyle: Responsive Drag-&-Drop Event Calendar Library for Web, Mobile Sites, Android, iOS & Windows Phone
Responsive Drag-&-Drop Event Calendar Library for Web, Mobile Sites, Android, iOS & Windows Phone - GitHub - nehakadam/CalenStyle: Responsive Drag-&-Drop Event Calendar Library for Web,…

9- dhtmlxScheduler

dhtmlxScheduler is a JavaScript library that allows you to add a Google-like scheduler to your web app or website.

With its intuitive drag-and-drop interface allows end users to quickly manage events and appointments in 10 different views, including Day, Week, Month, Year, Agenda, Timeline, etc. The Scheduler also supports integration with Google Maps, so users can assign a location to the particular calendar events. Moreover, they can create recurring and multiday events.

GitHub - DHTMLX/scheduler: GPL version of JavaScript Event Scheduler
GPL version of JavaScript Event Scheduler. Contribute to DHTMLX/scheduler development by creating an account on GitHub.

10- JS Calendar Library

A simple, lightweight, stylish calendar + organizer JavaScript Library. Although, the project is open source, it is in archive mode, and it did not receive any update for the last 3 years.

GitHub - nizarmah/calendar-javascript-lib: 📅 Javascript Calendar & Organizer Library for normal calendar use and or events scheduling.
📅 Javascript Calendar & Organizer Library for normal calendar use and or events scheduling. - GitHub - nizarmah/calendar-javascript-lib: 📅 Javascript Calendar & Organizer Library for normal…

11- jquery-calendar

A responsive jQuery calendar scheduler built with bootstrap and moment.js. It is released as an open source project under the MIT License. It offers two editions, the old one supports Bootstrap3 and the new updated is built on top of Bootstrap4.

GitHub - ArrobeFr/jquery-calendar-bs4: A responsive jquery calendar scheduler built with bootstrap 4 and moment.js
A responsive jquery calendar scheduler built with bootstrap 4 and moment.js - GitHub - ArrobeFr/jquery-calendar-bs4: A responsive jquery calendar scheduler built with bootstrap 4 and moment.js

As our post comes to an end, if you know of any JavaScript Calendar app or library that we missed, let us know.

JavaScript Calendar Libraries

30+ Open-source Free-to-use Calendar Library for React, Vue, jQuery and Plain JavaScript
A JavaScript calendar library is a tool that allows developers to create interactive calendars on websites using JavaScript. These libraries provide pre-built functions and styles for creating a calendar that can be customized to match the website’s design and requirements. There are several JavaSc…

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If you are looking for other calendar related projects, you may take a look at our calendar apps collections:

26 Best Free Open-source Calendar Apps for Windows, Linux, and macOS
Calendar is an app that is used on daily basis, it is a significant tool for organization, planning, daily routine tasks, appointments management, and personal improvements. As an example, Google Calendar is a scheduling calendar service by Google. It aids users in creating events, tasks, schedule…
Best 10 Calendar apps for Android that care about your privacy
The Calendar app is necessary for most users on their desktops or mobile phones. However, some may not like the built-in calendar application which integrated with their systems, sometimes because they are limited or because of privacy concerns. Android is no exception, it comes with a built-in Cal…
Best 12 Free Open-source Calendars apps for macOS
Apple’s macOS has a growing, loyal user-base around the world, yet many users are not aware of the availability of free, open-source alternatives to their daily used commercial software. In this article, we present several free, open-source calendar applications. With most of these apps, you can o…
Best 11 Open-source CalDAV Self-hosted Servers
What is CalDAV? CalDAV is the web standard calendaring extension for the WebDAV. It allows CalDAV clients to access, manage, sync and schedule calendar events and calendars on servers. CalDAV synchronizes calendar data across different devices. In this list, we preview some of self-hosted CalDAV…