This recipe creates an email variable for the current date.

my-pmpro-custom-email-varialbe.php

<?
/**
 * This recipe creates an email variable for the current date.
 * !!current_date!! will show the current date in the confirmation email.
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
 
function my_pmpro_email_variable_current_date( $data, $email ) {
    // Get the current date based on WordPress settings
    $current_date = current_time('mysql'); // Format is 'Y-m-d H:i:s' by default

    // Add the current date to the email data
    $data['current_date'] = date(get_option( 'date_format' ), strtotime($current_date));

    return $data;
}
add_filter( 'pmpro_email_data', 'my_pmpro_email_variable_current_date', 10, 2 );