ICS Calendar

How do I find my calendar’s ICS feed URL?

Different calendar systems have different ways to obtain the feed URL. You may need to consult your calendar software’s documentation for assistance. Find instructions for commonly used calendars below.

You will also need to make sure that your calendar is public. Private calendars cannot be accessed by this plugin.

Documentation quick links:

• Google Calendar
• Microsoft Office 365
• Apple iCloud

How do I insert a calendar into my page?

Use this shortcode, inserting your ICS feed URL between the quotation marks:

[ics_calendar url=""]

Be sure you are using the iCalendar subscription (ICS) URL (i.e. for importing into a calendar program), not the URL for viewing a calendar in a web browser. To test if you have the correct URL, paste it directly into your browser address bar. It should download an .ics file, not display the calendar in the browser.

Can I combine multiple calendars?

Yes! You can combine multiple calendars by including more than one feed URL in the url parameter. Separate the calendar URLs with one space or a pipe | character. Do not include any other delimiter characters, as they will be interpreted as part of the URL.

Why isn’t my calendar loading?

This may be due to your server’s configuration. This plugin requires either the PHP cURL extensions, or the allow_url_fopen PHP setting to be turned on. Check your PHP configuration or your server administrator if you think this may be the issue. You can also use the ICS Feed URL Tester utility on the ICS Calendar admin page to check if your server is able to connect to the calendar source.

Why isn’t my calendar updating?

For performance, this plugin uses WordPress transients to store retrieved calendar data for one hour between requests to the calendar source server. If you have updated events that are not showing up in your page, visit the ICS Calendar page in your site admin and click the Clear Cached Calendar Data button.

Third-party caching plugins may interfere with ICS Calendar’s feed syncing. ICS Calendar uses AJAX to work around most caching conflicts, but your caching plugin may require you to add the wp-admin/admin-ajax.php path to its list of exclusions in order for AJAX to function properly.

Why are event times an hour off after Daylight Saving Time begins?

PHP has two different ways of defining timezones: as a number of hours offset from GMT/UTC (e.g. “UTC-5”), or as a continent/city combination (e.g. “America/Chicago”). Timezones using UTC offsets do not handle Daylight Saving Time correctly (as noted in the PHP documentation ). Please check your WordPress timezone settings ( Settings > General > Timezone ). If it is set to a UTC offset, change it to the city closest to your location, in the same timezone. You can also set the timezone within the shortcode using the tz parameter. (Again, be sure to use a named region/city timezone, not a UTC offset.)

Additional documentation and support

Our User Guide includes extensive documentation of all features of the plugin, is frequently updated, and is translated into all languages supported by the plugin.

Feature requests

The paid ICS Calendar Pro add-on includes additional layout options, tools for customizing the calendar’s appearance more easily than directly editing CSS, an improved insertion tool, and more. We are also constantly adding new features and refinements to both the free and paid versions. If you have suggestions for features you’d like to see or any other additional input, please let us know by following the support link on the admin page or in the WordPress support forums ! The base plugin will always be free to use.