GigPress > Add an end date to the event schema markup.

gigpress-end-date-schema.php

<?php
/* 
 * Description:  Add an end date to the event schema markup.
 * Usage:        Paste the below snippet into your active (child) theme's functions.php file
 *
 * Plugin:       GigPress
 * Author:       Andras Guseo
 * Last updated: 2021-07-21
 */

add_filter( 'gigpress_show_json_ld_markup', 'gigpress_add_enddate_to_schema', 10, 2 );

function gigpress_add_enddate_to_schema( $show_markup, $showdata ) {
	// Do if end date is not set
	if ( empty( $show_markup['endDate'] ) ) {
		// Grab the end date and make a DateTime object
		// This will make it UTC timezone despite what the site timezone is
		$end_date = new DateTime( $showdata['iso_end_date'] );

		// Set the timezone to the site timezone
		// This will also adjust the time as well
		$end_date->setTimezone( wp_timezone() );

		// Get the timezone offset between UTC (PHP timezone?) and site timezone
		$tz_offset = timezone_offset_get( wp_timezone(), $end_date );

		// Substract the timezone difference from the time
		// This will 'reset' the time to the original with the appropriate time zone
		date_sub( $end_date, date_interval_create_from_date_string( $tz_offset . ' seconds' ) );

		// Add 1 hour to the end date
		date_add( $end_date, date_interval_create_from_date_string('1 hour' ) );

		// Format it
		$end_date = date_format( $end_date, 'c' );

		// Add it to the array
		$show_markup['endDate'] = $end_date;
	}

	return $show_markup;
}