EventON plugin for WordPress is a robust and feature-rich event calendar that offers a wide range of functionalities specifically designed to manage events effectively. Here is a summary of its key features and functionalities:

General Features:

Create single-day or multiple-day events
Create events without specific end times or ongoing events
All-day event creation
Duplicate events within the WordPress admin dashboard
Option to exclude specific events from the calendar display
Ability to span events until the end time while hiding the end time
Set event location images using latitude and longitude coordinates
Save locations for reuse in future events
Organizer contact information management for events

Calendar Display Customization:

Various user interaction options with events
Universal time and date format support
SEO-friendly schema content for calendar events
Auto-archiving of past events
Custom CSS styles can be easily added via eventON settings
Calendar month/year format customization
Reset calendar appearance to default settings easily
Display upcoming events list by months
Show featured events prominently on the calendar

Advanced Features:

Dynamic "load more" pagination for events
Display calendars for specific fixed months
Multiple images per event
AJAX-driven smooth month-to-month navigation
Add calendar to your theme via shortcode or PHP template tag
Integrated PayPal for event payments
Custom Language Text support with a POT file for further customization
Prioritize month/year-long events
Customizable event rows in the calendar
Integrated with Zoom for creating meetings
Gutenberg-compatible shortcode generator
Various event status values and attendance modes
Event status field editing via quick edit and bulk edit functions
Event status updates via bulk edit for event posts

Newer Additions and Integrations:

Happening now calendar view
Option to apply timezone value to all events
Integration with moment.js for local user time in events
Interactive repeat event setup
Related events in chronological order
Various optimizations for faster loading
AJAX-based event editing settings
Mobile-specific user interaction improvements
Multiple organizers assignment to an event
Social share options: WhatsApp and copy event link
Integration with WooCommerce, Zoom API, Paypal Basic, and others

The plugin also mentions its integration with various third-party tools and libraries such as Font Awesome, Google Maps API, Google Fonts API, handlebars.js, and more, providing extensive functionality and integration possibilities for WordPress users managing events on their websites.