Killian Santos

Icalviz connects to any public iCal feed and displays your availability day by day on any page or post, using a simple shortcode. Works with Google Calendar, Outlook, Apple Calendar, Nextcloud, and any service that exposes a public <code>.ics</code> link.
Each day is automatically classified:
<ul>
<li>🟢 Free — no events scheduled</li>
<li>🟡 Partial availability — some time slots are taken</li>
<li>🔴 Fully booked — your entire working hours are covered</li>
</ul>
Visitors can click any day to see occupied time slots in a clean timeline modal. Optionally display a call-to-action button (e.g. “Book this slot”) that links to your booking system.
Why Icalviz?
Stop copy-pasting your schedule into a webpage. Connect your Google Calendar, Outlook, Apple Calendar, or any iCal-compatible calendar — Icalviz reads your public iCal feed and updates automatically, every 30 minutes.
<h4>Use cases</h4>
🏢 Meeting room & shared space booking — Display a room’s availability calendar so your team or clients can instantly see open slots, without logging into any system.
📅 Show your public availability as a freelancer or consultant — Let potential clients see when you are free before they even reach out. Display months of availability from your Google Calendar, Outlook or any iCal feed in seconds.
🎓 Training sessions & open office hours — Show students or participants which session slots are still open. Mark them as full automatically when your agenda is blocked.
🏡 Seasonal rental & short-stay property — Display your gîte, studio, or vacation rental availability directly on your WordPress site, synced live from any iCal-compatible calendar.
🚗 Fleet & equipment availability — Track and display the availability of a shared vehicle, camera kit, or any bookable asset — simply by blocking time in Google Calendar, Outlook, or any other iCal calendar.
<h4>Key features</h4>
<ul>
<li>Zero configuration — Paste your iCal URL, copy the shortcode, done.</li>
<li>No API key required — Works with any public iCal feed: Google Calendar, Outlook, Apple Calendar, Nextcloud, and more.</li>
<li>Responsive — 2 columns on desktop, 1 on mobile. Navigation arrows for multi-month views.</li>
<li>Timeline modal — Click a day to see occupied time slots in a visual hourly timeline.</li>
<li>Call-to-action button — Add a custom button (e.g. “Request a slot”) inside the modal, linking to your booking page or contact form.</li>
<li>Custom labels — Rename “Free”, “Partial availability”, “Fully booked” to match your vocabulary.</li>
<li>Dark mode — Built-in light and dark themes.</li>
<li>Booking window — Limit how many days ahead users can see (e.g. next 90 days only).</li>
<li>Onboarding wizard — Step-by-step setup guides you from iCal URL to ready shortcode in under a minute.</li>
<li>Inline iCal tester — Paste a URL and instantly see whether it connects, how many events it contains, and what the next upcoming events are.</li>
<li>Debug panel — One-click diagnostic report covering WordPress environment, plugin version, cache status, iCal feed health, and slot calculation trace. Designed for quick support.</li>
</ul>
<h4>How it works</h4>
<ol>
<li>Get your public iCal URL (<code>.ics</code> link) from your calendar app:
<ul>
<li>Google Calendar: ⋮ → Settings and sharing → Make available to public → Public address in iCal format</li>
<li>Outlook: Calendar settings → Shared calendars → Publish → ICS link</li>
<li>Apple Calendar / iCloud: Calendar settings → Public Calendar → Copy link</li>
<li>Any other app: look for “Subscribe”, “iCal export” or “public ICS link”</li>
</ul>
</li>
<li>In WordPress: go to Settings → Icalviz, paste your iCal URL and follow the 3-step wizard.</li>
<li>Copy the generated shortcode and paste it into any page or post.</li>
</ol>
<h4>Shortcode reference</h4>
Basic: 
 [icalviz url=”https://calendar.google.com/calendar/ical/…/basic.ics”]
All options: 
 [icalviz url=”…” start=”9″ end=”17″ months=”3″ days_ahead=”90″ show_titles=”0″ disable_modal=”0″ legend=”1″ theme=”light” lbl_free=”Available” lbl_partial=”Limited availability” lbl_full=”Fully booked” cta_label=”Request this slot” cta_url=”https://your-booking-page.com”]
<ul>
<li><code>url</code> (required) — Your public <code>.ics</code> iCal link (Google Calendar, Outlook, Apple Calendar, etc.)</li>
<li><code>start</code> (0–23, default: 8) — Start of your working day in hours</li>
<li><code>end</code> (1–24, default: 18) — End of your working day in hours</li>
<li><code>months</code> (1–12, default: 2) — Number of months to display</li>
<li><code>days_ahead</code> (0–730, default: 0) — Days ahead to show; 0 = unlimited</li>
<li><code>show_titles</code> (0 or 1, default: 0) — Show event titles in the modal timeline</li>
<li><code>legend</code> (0 or 1, default: 1) — Show colour legend below calendar</li>
<li><code>theme</code> (light / dark, default: light) — Colour theme</li>
<li><code>lbl_free</code> (text, default: Free) — Label for free days</li>
<li><code>lbl_partial</code> (text, default: Available) — Label for partially available days</li>
<li><code>lbl_full</code> (text, default: Fully booked) — Label for fully booked days</li>
<li><code>cta_label</code> (text) — Text for the call-to-action button in the modal</li>
<li><code>cta_url</code> (URL) — Link for the call-to-action button</li>
<li><code>disable_modal</code> (0 or 1, default: 0) — Disable day-click modal; show only availability colour</li>
</ul>
<h4>Privacy</h4>
Icalviz connects only to the iCal URL you provide. No data is sent to any third party. The iCal feed is cached locally in your WordPress database for 30 minutes. If <code>show_titles</code> is set to 0 (default), event titles are never exposed to visitors.
<h4>Requirements</h4>
<ul>
<li>WordPress 5.8 or higher</li>
<li>PHP 7.4 or higher</li>
<li>A public iCal URL (<code>.ics</code> link) from Google Calendar, Outlook, Apple Calendar, Nextcloud, or any iCal-compatible service</li>
<li>Your WordPress timezone must be set correctly (Settings → General → Timezone)</li>
</ul>

Icalviz

Show your real-time Google Calendar availability as a beautiful front-end calendar — no API key, no coding required.

digitaldonkey

Lukas Pawlik

Borislav Angelov

farmer paul

Justas Butkus

hubrik

Nicola Peluchetti

Yani

An event calendar with native iCal / ICS import and export
<h3>Features</h3>
All features are provided in their entirety. No features are locked behind any add-ons.
<ul>
<li>Full iCal / ICS import & export
<ul>
<li>Automatically import external calendars</li>
<li>Categorize and tag imported feeds</li>
</ul>
</li>
<li>Recurring events, including complex recurrence rules <a href="https://icalendar.org/iCalendar-RFC-5545/3-8-5-3-recurrence-rule.html" rel="nofollow ugc">(RFC 5545)</a></li>
<li>Filtering by category and tag</li>
<li>Calendar sharing with Google Calendar, Apple iCal, Outlook, and any other system that accepts iCalendar (.ics) feeds</li>
<li>Month, week, day, and agenda views</li>
<li>Upcoming Events Gutenberg block</li>
<li>Direct links to filtered calendar views</li>
<li>Color-coded events by category</li>
<li>Featured event images and category images</li>
<li>SEO-optimized event pages</li>
<li>Mobile-friendly and responsive layouts</li>
<li>Embedded OpenStreetMap</li>
<li>Theme options to customize your calendar appearence</li>
<li>Your calendar can be embedded into a WordPress page without needing to create template files or modify the theme.</li>
</ul>
Import events from other calendars and offer users the ability to subscribe to your calendar.
Importing and exporting iCalendar (.ics) feeds is one of the strongest features of the Event Calendar system. This allows you to manage your websites calendar by providing a public calendar from your Google, Apple or other calendar management software.
<h3>Blocks</h3>
You can embed the calendar by adding a OSEC Calendar Block to any page or post. Alternatively there is a shortcode available.
<blockquote>
[!WARNING] 
 At this time, only one calendar per page or post is supported.
</blockquote>
On the long run it’s planned to have a Rest API to allow the calendar being rendered with more modern frontend tools than the current, outdated, but nice old Bootstrap 3 stuff.
<h3>Shortcodes</h3>
<h4>Calendar Views</h4>
<pre><code>[osec] // Default view per settings
[osec view="monthly"]
[osec view="weekly"]
[osec view="agenda"]
[osec view="daily"]
</code></pre>
<h4>Filtering</h4>
By category
<pre><code>[osec cat_name="Holidays"]
[osec cat_name="Lunar Cycles,zodia-date-ranges"]
[osec cat_id="1"]
[osec cat_id="1,2"]
</code></pre>
By tag
<pre><code>[osec tag_name="tips-and-tricks"]
[osec tag_name="creative writing,performing arts"]
[osec tag_id="1"]
[osec tag_id="1,2"]
</code></pre>
By post ID
<pre><code>[osec post_id="1"]
[osec post_id="1,2"]
</code></pre>
<h3>Requirements</h3>
<ul>
<li>WordPress: 6.6 or newer</li>
<li>PHP:
<ul>
<li>PHP 8.2+ required for development</li>
<li>PHP 8.1 may work for production builds when installed with <code>composer install --no-dev</code></li>
</ul>
</li>
</ul>
<h3>Languages</h3>
OSEC supports multiple languages
<h3>This Is a Fork</h3>
OSEC is a fork of the GPL licensed plugin All-in-one-Event-Calendar by Timely. At it’s time a great plugin with a solid but unmaintainable codebase (not all required developer tools where opensourced).
If you love truly open source software and don’t mind to get your hands dirty you should join here. Free people need free software to manage and share events in a selfhosted manner.
<h3>External services</h3>
OSEC may connect to OpenStreetMap to render maps. If you using maps feature make sure you agree with <a href="https://operations.osmfoundation.org/policies/" rel="nofollow ugc">Terms of Service</a>
OSEC may connect to OpenStreetMap Nominatim geocoding API. <a href="https://operations.osmfoundation.org/policies/nominatim/" rel="nofollow ugc">Terms of Service</a>. 
You may need to switch the servive on a heavy traffic site as Nominatim allows an absolute maximum of 1 request per second.
By default leaflet and leaflet-control-geocoder are loaded from unpkg.com. <a href="https://app.unpkg.com/policies@1.0.1" rel="nofollow ugc">Terms of Service</a>.
You can change using hooks: <code>osec_leaflet_library_alter</code>, <code>osec_leaflet_geocoder_library_alter</code>.
<h3>Migration Notes</h3>
Database structure is not fully compatible with All-in-One Event Calendar v2.3.4
Migration may be possible with manual effort
A standardized upgrade path may be developed if there is demand and contributions
See this <a href="https://github.com/digitaldonkey/open-source-event-calendar/wiki/migration-from-all%E2%80%90in%E2%80%90one%E2%80%90event%E2%80%90calendar" rel="nofollow ugc">wiki</a> for currently known information on migrating.
<h3>Development & Support</h3>
The principle behind this plugin is to be Open Source. Get in touch on <a href="https://github.com/digitaldonkey/open-source-event-calendar" rel="nofollow ugc">GitHub</a> to report issues, propose feature enhancements, and get general guidance for contributing.
Writing this fork was <a href="https://github.com/wp-plugins/all-in-one-event-calendar/compare/master...digitaldonkey:open-source-event-calendar:master" rel="nofollow ugc">a huge effort</a>.
Digitaldonkey believes everybody should be able to set up and manage public calendars.
If you are implementing this plugin for others you should support ongoing development with a <a href="https://www.paypal.com/donate/?hosted_button_id=ZNWEQRQNJBTE6" rel="nofollow ugc">donation</a> or <a href="https://github.com/digitaldonkey/open-source-event-calendar/issues" rel="nofollow ugc">contribution</a>.
<a href="https://dri.es/solving-the-maker-taker-problem" rel="nofollow ugc">Be a maker</a>😀
Those wishing to contribute to the development of this project, please see the <a href="https://github.com/digitaldonkey/open-source-event-calendar/blob/master/.github/CONTRIBUTORS.md" rel="nofollow ugc">Development Guide</a> for more information.

Open Source Event Calendar

An event calendar with native iCal / ICS import and export

Icalviz vs Open Source Event Calendar