This fork introduces a URL Cron Job to refresh iCal feeds (wpsbc-ical-url-refresh.php), addressing limitations with the internal iCal refresh intervals in Settings > General > iCal Refresh Times.
Note: Tested on the official WordPress plugin, not the GitHub repo (which appears outdated).
WP Simple Booking Calendar significantly improved my business operations. While I considered creating a separate plugin, I chose to contribute directly to benefit the community.
This addition aims to help users seeking a solution for iCal refresh issues in WP Simple Booking Calendar.

For detailed setup instructions, please refer to the wpsbc-ical-url-refresh.md file.

Recommended Setup for Auto-Updating WordPress Themes
If you have WordPress themes set to auto-update and plan on exporting your iCal events, I highly recommend installing the WPCode Plugin (Free) and adding the PHP snippet provided below. This ensures that the URL Cron Job functionality is retained even after updates to your theme or the WP Simple Calendar Plugin.

Here’s the crucial PHP snippet you need to add:

// Manual add: Include icalendar events in export file
add_filter('wpsbc_export_calendar_include_icalendar_events', function() {
    return true;
});

This filter ensures that iCalendar events are included in the export file, which is essential for maintaining the integrity of your data during exports.

Additionally, I use several other functions to enhance the user experience in the WP Simple Calendar Plugin. In WPCode, ensure you:

•	Add the code as a PHP Snippet
•	Select Auto Insert as the insert method
•	Set the location to Run Everywhere

By following these steps, you can prevent loss of functionality after updates and improve your overall experience with the WP Simple Calendar Plugin.

Additionally, I use several other functions to enhance the user experience in the WP Simple Calendar Plugin. Here are the recommended tweaks I use with WP Code Snippet (you can put them all in one snippet) 

// Manual add: Include icalendar events in export file
add_filter('wpsbc_export_calendar_include_icalendar_events', function(){ return true; });
//  Manual add: Disable past months in the months selector   --Single Calendar
add_filter('wpsbc_calendar_output_month_selector_hide_past_months', 'wpsbc_custom_selector_past_months', 10, 1);
//  Manual add: Disable past months in the months selector   --Overview Calendar
add_filter('wpsbc_calendar_overview_output_month_selector_hide_past_months', 'wpsbc_custom_selector_past_months', 10, 1);
// Manual add: Disable past months in the months selector    --add function
function wpsbc_custom_selector_past_months(){ return false; }

In WPCode, ensure you:

Add the code as a PHP Snippet
Select Auto Insert as the insert method
Set the location to Run Everywhere

By following these steps, you can prevent loss of functionality after updates and enhance your overall experience with the WP Simple Calendar Plugin.

=== WP Simple Booking Calendar ===
Contributors: Bryght, BestWebSoft
Tags: booking calendar, bookings, booking, bookable, calendar, availability calendar, availability, reservation calendar, reservations, scheduling, schedule, rooms, hotel, holiday home, accommodations, dateblocker, date blocker, bed and breakfast, belegungsplan, beschikbaarheidskalender
Requires at least: 3.0
Tested up to: 4.3
Stable tag: 1.4.1

This booking calendar shows when something is booked or available. Use it to show when your holiday home is available for rent, for example.

== Description ==

Create a booking calendar for your website! Do you want to show people when your holiday home (or something else) is available for rent? You can create, edit and publish a booking calendar with just a few clicks with the WP Simple Booking Calendar. This booking calendar is very easy to use! You can manage the bookings (availability) on a daily basis and embedding the booking calendar on a page takes only one mouse click. You can also use the WP Simple Booking Calendar Widget to show a booking calendar on your WordPress website. Check out http://www.wpsimplebookingcalendar.com for more information about this booking calendar.

You can use this booking calendar as:

* Booking calendar / availability calendar for a holiday home, bed & breakfast, condo or hotel
* Booking calendar / availability calendar for a room or office
* Booking calendar / availability calendar for  a car or boat
* A booking calendar for equipment
* A shift calendar
* Whatever you like!

Features of the Free version:

* Create a booking calendar and set a status per date
* Generate a token to insert the booking calendar in a page or post
* WP Simple Booking Calendar Widget (booking calendar as widget)
* Can be translated into other languages using PO files

Features of the Premium version:

* Create an unlimited number of booking calendars
* Display multiple months
* Edit multiple dates with one click
* Display a legend near the calendar
* Create your own legend (apply your own colours and translations)
* Change the first day of the week
* Change the start month / year
* Add and save booking information for each day on each of your booking calendars
* User management: assign users to calendars
* Display a tooltip with info (you can enter info for each day)
* Show the week's number
* Generate a token to insert the booking calendar in a page or post
* WP Simple Booking Calendar Widget (booking calendar as widget)
* Easy to translate into your own language
* Download the Premium version at: http://www.wpsimplebookingcalendar.com


== Installation ==

1. Upload `wp-simple-booking-calendar` directory to the `/wp-content/plugins/` directory
2. Activate the plugin through the 'Plugins' menu in WordPress
3. Go to the settings page of the plugin to setup a calendar
4. Embed the calendar on any page or post using the shortcode **[sbc]**

A sidebar widget is also available.


== Frequently Asked Questions ==

= How can I embed the booking calendar on a page or post? =

Use the 'Generate token' field below your editor. An example of a token: [sbc title="yes"]. If you paste this token in a page it will show your booking calendar with the title.

= How can I remove the booking calendar title from displaying? =

Edit the shortcode: title="no".

= I have another question =

Please see http://www.wpsimplebookingcalendar.com for more information and ask your questions there!


== Screenshots ==

1. Two month view of the booking calendar (free version supports one month view only)
2. The booking calendar in a sidebar as widget
3. Editing the booking calendar

== Changelog ==

= 1.4.1 =
* Small hash tweak

= 1.4 =
* Security hardening (added a unique identifier to all urls in a form of a hash)

= 1.3 =
* Small CSS tweaks for WordPress 3.8

= 1.2 =
* Changed .live() to .on() for better compatibility with jQuery

= 1.1 =
* Fixed Warning: array_key_exists() error some users experienced
* Fixed enqueue_scripts

= 1.0 =
* First release

== Upgrade Notice ==

= 1.4.1 =
* Small hash tweak

= 1.4 =
* Security hardening (added a unique identifier to all urls in a form of a hash)

= 1.3 =
* Small CSS tweaks

= 1.2 =
* Small improvement for the free version

= 1.1 =
* Two small fixes

= 1.0 =
* Stable release