Orthodox Calendar

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.

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.