Change the button text for the Register Now button on the Event Espresso calendar

gistfile1.md

Add the sample code below to your child theme's functions.php file or in a site specific plugin.

<?php
//* Do NOT include the opening php tag
 
//* Replace the Register Now text with something else
function ee_change_register_now_button_calendar( $translated, $original, $domain ) {
 
    $strings = array(
        'Register' => 'Sign up',
    );

    if ( isset( $strings[$original] ) ) {
        $translations = &get_translations_for_domain( $domain );
        $translated = $translations->translate( $strings[$original] );
    }
 
    return $translated;
}
 
add_filter( 'gettext', 'ee_change_register_now_button_calendar', 10, 3 );

References:

http://eventespresso.com/topic/ee-4-calendar-tooltip-change-register-now-button-text/