Hi There,
First copy this below functions and paste in to child theme functions.php file. Then find your string that need to be canged.
function puresimple_posted_on() {
$time_string = '<time class="entry-date published" datetime="%1$s">%2$s</time>';
if ( get_the_time( 'U' ) !== get_the_modified_time( 'U' ) ) {
$time_string .= '<time class="updated" datetime="%3$s">%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() )
);
$posted_on = sprintf(
__( 'Published on %s', 'pure-simple' ),
'<a href="' . esc_url( get_permalink() ) . '" rel="bookmark">' . $time_string . '</a>'
);
$byline = sprintf(
_x( 'by %s', 'post author', 'pure-simple' ),
'<span class="author vcard"><a href="' . esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ) . '">' . esc_html( get_the_author() ) . '</a></span>'
);
echo '<span class="posted-on">' . $posted_on . '</span><span class="byline"> ' . $byline . '</span>';
//displaying author and category in home page
if(is_home()){ echo '<span class="category-name">';
echo ' '.__('Category:','pure-simple').'<span class="">'.' '.get_the_category_list( __( ', ', 'pure-simple' ) ).' </span>';}
}
Note: If you are familiar with basic of php coding then only try this code, otherwise you will be facing error. It will be better if you get help from developer.