Árpád Lehel Mátyus

Atomic Events Calendar is built for developers and agencies who need events in WordPress without the overhead of full event management plugins.
Instead of starting from scratch on every project, Atomic Events Calendar gives you:
– A ready-to-use Events post type 
– Essential event fields (date, venue, type, etc.) 
– Developer-friendly shortcodes to display and filter events 
– A robust theming structure for easy overrides and custom designs
✨ Think of it as a lightweight framework disguised as a plugin: everything you need to set up events quickly, with the freedom to extend and customize as you like.
Perfect for agencies that want full control over their event implementations—without the bloat.
<h3>Features</h3>
<ul>
<li>Developer-Friendly – Clean code structure with services architecture</li>
<li>Responsive Design – Built with Tailwind CSS for modern, responsive layouts</li>
<li>Structured Data for Search Engines – Automatic JSON-LD schema markup for better SEO and rich snippets</li>
<li>Custom Post Type – Dedicated ‘atomic-event’ post type with all necessary fields</li>
<li>Template Override System – Easy theme integration with template hierarchy</li>
<li>Shortcode Support – Display events anywhere with <code>[atomic-events]</code> shortcode</li>
<li>Featured Events – Mark and display featured events prominently</li>
<li>Location Management – Complete address fields (street, city, state, country, postcode)</li>
<li>Date & Time Support – Start/end dates with time support</li>
<li>Image Support – Featured images with captions</li>
<li>Member-Only Events – Restrict events to members only</li>
<li>Performance Caching – Automatic shortcode caching with smart invalidation</li>
</ul>
Basic usage is through shortcode:
<pre><code>[atomic-events filter max='10' columns='3' featured='0' 
 skip_first_x='0' skip_first_x_featured='1' order='ASC']
</code></pre>
<h3>How can I customize the event template?</h3>
The plugin provides a default template for single events, but you can override it in your theme:
<ol>
<li>Child Theme (recommended): Copy the template to <code>child-theme/atomic-events/single/single-atomic-event.php</code></li>
<li>Parent Theme: Copy the template to <code>parent-theme/atomic-events/single/single-atomic-event.php</code></li>
</ol>
The plugin will automatically use your theme’s version instead of the default.
See the example template in <code>templates/theme-override-example.php</code> for reference.
<h4>My event pages show 404 errors</h4>
If you experience 404 errors when viewing event pages: 
1. Go to WordPress Admin → Events → Settings 
2. Click “Flush Rewrite Rules” 
3. If that doesn’t work, go to Settings → Permalinks and click “Save Changes”
<h3>Template Structure</h3>
The plugin provides a comprehensive template override system. You can override any template by creating files in your theme:
<pre>
 your-theme/
 └── atomic-events/
 │ ├── cards/
 │ │ ├── card-item-default.php
 │ │ ├── card-item-featured.php
 │ │ ├── card-list-header-default.php
 │ │ └── card-list-footer-default.php
 │ ├── single/
 │ │ └── single-atomic-event.php
 │ ├── content/
 │ │ └── single-event.php
 │ 
</pre>
<h3>Template Hierarchy</h3>
The plugin follows WordPress template hierarchy for single event pages. Templates are loaded in this order of priority:
<ol>
<li>Child Theme: <code>child-theme/atomic-events/single/single-atomic-event.php</code></li>
<li>Parent Theme: <code>parent-theme/atomic-events/single/single-atomic-event.php</code></li>
<li>Plugin Default: <code>plugin/templates/single/single-atomic-event.php</code></li>
</ol>
<h3>Template Override System</h3>
The plugin uses a custom template loader that checks for theme templates first, then falls back to the plugin’s default template. This ensures:
– Theme compatibility: Works with any WordPress theme 
– Customization flexibility: Easy to override in themes 
– Update safety: Plugin updates won’t break custom templates 
– Developer-friendly: Clear hierarchy and fallback system
Template Hierarchy Priority:
<ol>
<li>Child Theme: <code>child-theme/atomic-events/[template-name].php</code></li>
<li>Parent Theme: <code>parent-theme/atomic-events/[template-name].php</code></li>
<li>Plugin Default: <code>plugin/templates/[template-name].php</code></li>
</ol>
Available Templates: 
– Shortcode Templates: Override how events appear in lists and grids 
– Single Event Templates: Customize individual event page layouts 
– Content Templates: Modify event content display
The default template includes: 
– WordPress header/footer integration 
– Event model for accessing custom fields 
– Template loader for modular content parts 
– Proper WordPress loop structure
<h3>Custom Fields Available</h3>
When creating custom templates, you have access to these event fields:
<pre>
$event_model = new AtomicEventModel(get_the_ID());

// Basic event data
$event_model->get_title();
$event_model->get_event_start_date();
$event_model->get_event_end_date();
$event_model->get_event_venue();
$event_model->get_event_location_city();
$event_model->get_event_country();
$event_model->get_event_location_state();
$event_model->get_event_location_region();

// Event settings
$event_model->is_featured();
$event_model->is_member_only();
$event_model->get_event_all_day();

// Additional data
$event_model->get_event_outbound_link();
$event_model->get_event_tag();
$event_model->get_event_image_id();
$event_model->get_permalink();
</pre>
<h3>Creating Custom Templates</h3>
<ol>
<li>Copy the example template from <code>templates/theme-override-example.php</code></li>
<li>Place it in your theme at the appropriate path</li>
<li>Customize the template as needed</li>
<li>Test thoroughly to ensure proper functionality</li>
</ol>
<h3>Hooks and Filters</h3>
The plugin provides several hooks for customization:
<pre>
// Filter the template path
add_filter('atomic_events_template_path', 'my_custom_template_path', 10, 2);

// Filter event data before display
add_filter('atomic_events_event_data', 'my_custom_event_data', 10, 2);

// Filter whether to show event in lists
add_filter('atomic_events_should_show_in_list', 'my_custom_visibility_logic', 10, 2);
</pre>
<h3>Shortcode Parameters</h3>
The <code>[atomic-events]</code> shortcode supports these parameters:
– <code>filter</code>: “future” or “past” (default: “future”) 
– <code>max</code>: Maximum number of events (default: 20) 
– <code>columns</code>: Number of columns (default: 3) 
– <code>featured</code>: Show only featured events (true/false) 
– <code>skip_first_x</code>: Skip first X events 
– <code>skip_first_x_featured</code>: Skip first X featured events 
– <code>order</code>: “ASC” or “DESC” (default: “ASC”)
<h3>Best Practices</h3>
<ol>
<li>Always use child themes for customizations</li>
<li>Test with different themes to ensure compatibility</li>
<li>Use the event model for accessing custom fields</li>
<li>Follow WordPress coding standards</li>
<li>Document custom modifications</li>
<li>Test thoroughly before deployment</li>
</ol>

Atomic Events Calendar

Atomic Events Calendar: A lightweight WordPress events framework that gives agencies full control without the bloat.

faebu

WP Calendar is an easy-to-use calendar plug-in to manage all your events with many options and a flexible usage. 
The whole usage is extensive and completely documented. It supports all-day events, categorization and state management (draft, publish). 
To manage the event, the same authority checks as for post are used. The plug-in can be integrated in your blog using widgets, 
into any theme by using different functions and in any post and page by using different tags.
<h4>Important Upgrade Notice for 1.5.1/2</h4>
Due to a jQuery update in WordPress 3.5 the graphical Calendar stopped working and I had to update the external FullCalendar library. The newest 
version of FullCalendar also needed an update of the graphical calendars stylesheet. If you upgrade to 1.5.1 and if you have a modified fullcalendar.css 
file in your theme directory, make sure you copy the fullcalendar.css file from the plug-in directory and adapt your modifications again! 
The graphical calendar will probably not work with your modified stylesheet!
If you have any category specific styling, these style have to be slightly adjusted, because the DOM structure of the displayed events in the 
graphical calendar have change. Have a look at the FAQ section, which discribes how to style events by it’s category.
<h4>Features</h4>
<ul>
<li>NEW: Ical Feed of your events!</li>
<li>Graphical calendar</li>
<li>Widget</li>
<li>Event categorization (using WP categories)</li>
<li>Event states (draft, published)</li>
<li>Normal and all-day events</li>
<li>Easy to use admin interface (WordPress style)</li>
<li>Event overview including filters and pagination</li>
<li>Easy and fully documented integration</li>
<li>Mass operations on events (delete, set state)</li>
<li>Cloning of events</li>
<li>Event creation from post including content synchronization</li>
<li><a href="http://www.faebusoft.ch/webentwicklung/wp-calendar-1-4-0-freigegeben/" rel="nofollow ugc">Comments for events</a></li>
<li>Same authority checks as for post and pages</li>
<li>Supports special tags in post/page content and title</li>
<li>Different functions for integration in your theme</li>
<li>Event grouping in output (per day, month or year)</li>
<li>Internationalization including date formats</li>
</ul>
<h4>Planned</h4>
<ul>
<li>Repeating/Reccuring events</li>
<li>Customer fields</li>
<li>Google Maps integration</li>
<li>Dashboard integration</li>
<li>Location templates</li>
<li>Content templates</li>
<li>Search integration</li>
</ul>
<h3>Usage</h3>
Please refer to the usage documentation in the calendar’s options page. Since version this plug-in has built-in widgets 
for easy usage. If these widgets don’t fit your needs, you may integration WP Calendar manually by using tags or php functions.
For all german speaker plese see also the post <a href="http://www.faebusoft.ch/webentwicklung/wp-calendar-integration/" rel="nofollow ugc">Integration von WP Calendar</a>.

WP Calendar

WP Calendar is an easy-to-use calendar plug-in to manage all your events with many options and a flexible usage.

Atomic Events Calendar vs WP Calendar