Title: [Plugin: Availability Calendar] Fatal error
Last modified: August 20, 2016

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# [Plugin: Availability Calendar] Fatal error

 *  Resolved [TONYBRIAN1979](https://wordpress.org/support/users/tonybrian1979/)
 * (@tonybrian1979)
 * [13 years, 10 months ago](https://wordpress.org/support/topic/plugin-availability-calendar-fatal-error/)
 * When I install this plugin on my website [http://www.richardperryment](http://www.richardperryment)
   I get the following error Fatal error: Call to undefined function cal_days_in_month()
   in /home/p/e/perryment/public_html/wp-content/plugins/availability/manage.php
   on line 44
 * Any idea how to fix this?
 * [http://wordpress.org/extend/plugins/availability/](http://wordpress.org/extend/plugins/availability/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Steve](https://wordpress.org/support/users/stvwhtly/)
 * (@stvwhtly)
 * [13 years, 6 months ago](https://wordpress.org/support/topic/plugin-availability-calendar-fatal-error/#post-2915331)
 * Hi,
 * This can be fixed by modifying the manage.php file and replacing:
 * `<?php $total = cal_days_in_month(CAL_GREGORIAN, $month, $this->year); ?>`
 * with:
 * `<?php $total = intval( date( 't', mktime( 0, 0, 0, $month, 1, $this->year ) ));?
   >`
 * This will be modified when 0.2.3 is released.
 * Thanks for notifying me of this issue.

Viewing 1 replies (of 1 total)

The topic ‘[Plugin: Availability Calendar] Fatal error’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/availability_d7d8d9.svg)
 * [Availability Calendar](https://wordpress.org/plugins/availability/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/availability/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/availability/)
 * [Active Topics](https://wordpress.org/support/plugin/availability/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/availability/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/availability/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Steve](https://wordpress.org/support/users/stvwhtly/)
 * Last activity: [13 years, 6 months ago](https://wordpress.org/support/topic/plugin-availability-calendar-fatal-error/#post-2915331)
 * Status: resolved