time in the post

You should open index.php (it maybe other file depending on your theme) in Appearance > Editor, then find something like <div class="author"><?php printf(__ ( 'by %s on', 'titan'), get_the_author()); ?> <?php the_time(__ ( 'F jS, Y', 'titan')); ?></div> (this example is for my Titan theme, yours may be different) – then you just need to cut (or better comment) that part.