Custom template tag for formating an ACF date-time field.php

/*** Custom template tag for styling an ACF date/time field (IMPORTANT, this works for the ACF Date/Time field only)
Set ACF date/time field return format to: Ymd H:i:s
Tag format: {{datetimeformat.event_start|M j, Y | g:i a}}
–––––––––––––––––––––––––––––––––––––––––––––––––– ***/
add_filter("render_block", "wsv_date_time_format_tags", 11, 2);

function wsv_date_time_format_tags($block_content, $block) {
    // Updated pattern to match {{datetimeformat.<field>|<format>}} and allow the | character in the format
    $pattern = "/{{datetimeformat\.([\w-]+)\|([,\w\s:-\|]+)}}/";

    $new_content = preg_replace_callback($pattern, function ($matches) {
        if (!function_exists("get_field")) return $matches[0]; // Ensure ACF is active

        $field_name = trim($matches[1]);
        $format = $matches[2];
        $field_value = get_field($field_name);

        // Check if the field value is available and not empty
        if ($field_value) {
            // Handle both date and date-time formats
            $date_format = strpos($field_value, ' ') !== false ? 'Ymd H:i:s' : 'Ymd';

            // Attempt to create a DateTime object
            $date = DateTime::createFromFormat($date_format, $field_value);

            if ($date !== false) {
                // Return the formatted date or time
                return $date->format($format);
            }
        }

        // If no valid date or time, return the original tag
        return $matches[0];
    }, $block_content);

    return $new_content;
}