Function php
// By SocioEducation add_filter( 'generate_post_date_output', function( $output, $time_string ) { $time_string = '<time class="entry-date published" datetime="%1$s" itemprop="datePublished"> Published on: %2$s</time>'; if ( get_the_date() !== get_the_modified_date() ) { $time_string = '<time class="entry-date updated-date" datetime="%3$s" itemprop="dateModified">Last Updated on: %4$s</time>'; } $time_string = sprintf( $time_string, esc_attr( get_the_date( 'c' ) ), esc_html( get_the_date() ), esc_attr( get_the_modified_date( 'c' ) ), esc_html( get_the_modified_date() ) ); return sprintf( '<span class="posted-on">%s</span> ', $time_string ); }, 10, 2 );