Title: Orthodox Calendar Author: davidbrush Published: 26. Februar 2010 Last modified: 18. September 2026 --- Search plugins ![](https://s.w.org/plugins/geopattern-icon/orthodox-calendar.svg) # Orthodox Calendar By [davidbrush](https://profiles.wordpress.org/davidbrush/) [Download](https://downloads.wordpress.org/plugin/orthodox-calendar.1.3.0.zip) * [Details](https://de-ch.wordpress.org/plugins/orthodox-calendar/#description) * [Reviews](https://de-ch.wordpress.org/plugins/orthodox-calendar/#reviews) * [Installation](https://de-ch.wordpress.org/plugins/orthodox-calendar/#installation) * [Development](https://de-ch.wordpress.org/plugins/orthodox-calendar/#developers) [Support](https://wordpress.org/support/plugin/orthodox-calendar/) ## Description Orthodox Calendar displays daily Orthodox calendar information from Holy Trinity Orthodox Church. The plugin language is selected by an administrator in Settings > Orthodox Calendar. The selected language determines the calendar service URL, remote endpoint, widget title, and navigation messages. English configuration: * Title: Orthodox Calendar * Site: https://www.holytrinityorthodox.com/calendar/ * Remote endpoint: https://www.holytrinityorthodox.com/calendar/calendar2.php Russian configuration: * Title: Православный календарь * Site: https://www.holytrinityorthodox.com/ru/calendar/ * Remote endpoint: https://www.holytrinityorthodox.com/ru/calendar/calendar2.php The Russian remote endpoint is normalized to HTTPS. Features include: * English or Russian language selection as a plugin option. * Display the current day’s Orthodox Calendar. * Navigate to the previous day. * Return to today’s date. * Navigate to the next day. * Uses the WordPress HTTP API. * Uses the WordPress AJAX API. * Sanitizes and validates incoming data. * Escapes output according to WordPress coding standards. * Uses a strict HTML allowlist for remote content. * Validates remote links and images against the selected Holy Trinity calendar path. * Converts the remote Windows-1251 calendar response to UTF-8. * Uses WordPress transients to reduce remote requests. ## Installation 1. Upload the `orthodox-calendar` folder to the `/wp-content/plugins/` directory. 2. Activate the plugin through the WordPress Plugins screen. 3. Go to Settings > Orthodox Calendar and choose English or Russian. 4. Go to Appearance > Widgets and add the «Orthodox Calendar» widget to a sidebar. ## FAQ ### How do I choose the language? Go to Settings > Orthodox Calendar and select English or Русский. English is the default. ### Does the plugin use file_get_contents()? No. The plugin uses the WordPress HTTP API with `wp_remote_get()`. ### Is calendar information cached? Yes. Calendar responses are sanitized and cached temporarily using the WordPress Transients API. English and Russian responses use separate cache keys. ### Does the remote calendar use Windows-1251? Yes. The remote calendar response is converted from Windows-1251 to UTF-8 before sanitization and display. ## Reviews There are no reviews for this plugin. ## Contributors & Developers “Orthodox Calendar” is open source software. The following people have contributed to this plugin. Contributors * [ davidbrush ](https://profiles.wordpress.org/davidbrush/) [Translate “Orthodox Calendar” into your language.](https://translate.wordpress.org/projects/wp-plugins/orthodox-calendar) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/orthodox-calendar/), check out the [SVN repository](https://plugins.svn.wordpress.org/orthodox-calendar/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/orthodox-calendar/) by [RSS](https://plugins.trac.wordpress.org/log/orthodox-calendar/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 1.3.0 * Added English/Russian language selection as a WordPress plugin option. * Added Settings > Orthodox Calendar. * Added language-specific calendar site URLs and remote endpoints. * Added English and Russian widget titles and navigation messages. * Added language to transient cache keys. * Added strict URL path validation for the selected calendar language. * Preserved the WordPress HTTP API and AJAX architecture. * Preserved the strict remote HTML allowlist and output escaping. * Preserved Windows-1251 to UTF-8 conversion. #### 1.2.0 * Modernized plugin structure. * Replaced deprecated plugin path constants. * Replaced direct remote requests with the WordPress HTTP API. * Removed `file_get_contents()`. * Removed `get_headers()`. * Replaced the standalone PHP proxy with the WordPress AJAX API. * Added nonce verification. * Added sanitization and validation of AJAX input. * Added output escaping. * Added transient caching. * Moved JavaScript to a separate file. * Updated widget registration. * Improved accessibility of navigation buttons. #### 1.1 * Previous version. ## Meta * Version **1.3.0** * Last updated **3 Wochen ago** * Active installations **60+** * WordPress version ** 5.8 or higher ** * Tested up to **7.1.2** * PHP version ** 7.4 or higher ** * Language * [English (US)](https://wordpress.org/plugins/orthodox-calendar/) * Tags * [calendar](https://de-ch.wordpress.org/plugins/tags/calendar/)[christian](https://de-ch.wordpress.org/plugins/tags/christian/) [church](https://de-ch.wordpress.org/plugins/tags/church/)[orthodox](https://de-ch.wordpress.org/plugins/tags/orthodox/) [russian](https://de-ch.wordpress.org/plugins/tags/russian/) * [Advanced View](https://de-ch.wordpress.org/plugins/orthodox-calendar/advanced/) ## Ratings Es wurden noch keine Rezensionen eingereicht. [Your review](https://wordpress.org/support/plugin/orthodox-calendar/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/orthodox-calendar/reviews/) ## Contributors * [ davidbrush ](https://profiles.wordpress.org/davidbrush/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/orthodox-calendar/)