dhtmlx

An easy to implement event calendar plugin built on top of <a href="http://dhtmlx.com/docs/products/dhtmlxScheduler/" rel="nofollow ugc">dhtmlxScheduler</a> 
that provides an Ajax-based scheduling interface similar to Google Calendar. The plugin allows you 
to manage single or multiple user events, display any type of events and appointments, and put a list of the upcoming events on a side bar.
Users can add/edit/delete events on the fly and easily change event date and time by simply dragging the event boxes. 
You can set up different levels of permissions to people who will use the calendar: make the scheduler read-only or allow 
a group of users to edit the events through a web-based calendar interface.
The calendar can be configured to display events in Day, Week, Month, Agenda, Timeline view, as well as in any custom view. The intuitive admin panel 
makes it easy to customize the calendar to your needs. You can use the plugin as an event calendar or as archive calendar to display your blog posts archive (in this case it works in read-only mode).
Main Features
<ul>
<li>Day, Week, Month, Year, Agenda, Timeline Views</li>
<li>The ability to create a custom View </li>
<li>Ajax-enabled, intuitive interface</li>
<li>Drag-n-drop support to configure event date and time</li>
<li>Easy-to-customize</li>
<li>Single/multi-day events </li>
<li>Customizable time scale </li>
<li>Recurring events </li>
<li>Configurable access and edit rights</li>
<li>Upcoming events widget</li>
<li>Localization to more than 20 languages</li>
</ul>
What’s New in 3.0
<ul>
<li>Week Agenda View</li>
<li>Map View (integration with Google Maps)</li>
<li>Timeline View</li>
<li>Full day event</li>
<li>The ability to display event creator </li>
<li>Export to/from Google Calendar</li>
<li>Built-in export to PDF and iCal</li>
<li>WPMU support</li>
</ul>
Requirements
<ul>
<li>PHP 5.0 or greater</li>
<li>MySQL 4.0 or greater</li>
</ul>

Event Calendar / Scheduler

Event calendar plugin that allows you to add a nice-looking scheduler/planner with drag-n-drop interface, recurring events, Google Map integration.

Freemius

beat.k

Termin-Kalender: Appointments & Team Organization – without the chaos.
<h3>Termin-Kalender: The Smart Alternative for Small Teams & Clubs</h3>
VERSION 1.3 Lite
Appointments & Team Organization – without the chaos. 
The smart alternative for small teams, clubs, and freelancers. Forget bloated project management tools or rigid event-ticketing plugins! Termin-Kalender combines a lightning-fast, beautiful calendar with simple team tools (To-Dos, Messages). 
No “empty screen” on your first start thanks to our clever assistant, no steep learning curve. Just install, display your appointments, and be productive instantly!
<h3>🎯 Why “Termin-Kalender”? (The end of plugin chaos)</h3>
Stop managing separate calendar, task list, and reservation form plugins. We built Termin-Kalender to give small workgroups exactly what they need: A perfect schedule overview blended with lightweight team communication.
<h3>✨ The Highlights (Free Version)</h3>
<ul>
<li>Start in Seconds: Describe your project briefly (e.g., “Sports club with 3 teams”), and our clever assistant instantly builds perfectly color-coded categories for you. No endless setup, no empty calendar on your first run!</li>
<li>Looks Fantastic Everywhere: Show the full calendar or a compact list of upcoming appointments on your website. Insert your events via Gutenberg, Widget, or Shortcode – they adapt seamlessly to your theme.</li>
</ul>
<h3>🚀 Termin-Kalender PRO (For professional teamwork)</h3>
<ul>
<li>Internal Tasks & To-Dos: Keep your To-Dos in a simple list that is easily shared. To-Dos with dates show up directly in your calendar. Appointment requests from forms land straight in your To-Dos AND your calendar!</li>
<li>Team Messages: Easily set up teams and a frontend app for discussions and team meetings. Includes a reminder function for all popular messengers.</li>
<li>Flexible Bookings & Forms: Let clients book appointments, cars, tables, or consultations. Define blocked times to prevent double bookings 100% in real-time. Requests arrive straight on your integrated To-Do list …and in your calendar.</li>
<li>Absolute Theme Freedom: The engine creates standard Gutenberg posts that are perfectly and beautifully designed. Show events just like real blog posts, without being trapped in rigid calendar layouts.</li>
<li>Edit from Anywhere: Allow team members to manage the calendar directly from the frontend without logging into the WordPress backend.</li>
<li>Display Any External Calendar: Have a Google- or iCloud-Calendar already? Add the iCal-Link easily and show it directly on your website! (Another plugin saved!) Plus: You can also sync private Google events to your backend calendar for a unified overview.</li>
</ul>
*PRO features require an upgrade.
Termin-Kalender: Your all-in-one planning & team solution.
<h3>Credits</h3>
This plugin uses the following libraries: 
flatpickr: https://github.com/flatpickr/ 
Fullcalendar: https://fullcalendar.io/ 
rrule: https://github.com/jkbrzt/rrule 
Inspired by ajax-event-calendar from Eran Miller, a discontinued plugin, last updated in 2015 for WordPress 4.2 https://wordpress.org/plugins/ajax-event-calendar/#description 
My easy Termin-Kalender calendar is a complete code redo and enhancement, based on the most recent WordPress 6.+, Fullcalendar 6.+ and PHP 8.+ as of 2026.

Termin-Kalender


Late Beta works well so far. Before installing PRO, uninstall FREE and EXCLUDE the calendar page in caching settings, if you use a caching Plug-In and new calendar entries or changes does not show immediately. 


Late Beta works well so far

Termin-Kalender: Appointments & Team Organization – without the chaos.

Event Calendar / Scheduler vs Termin-Kalender