Robin

the other option could be

<?php
if (is_category(23))
{
function jl_remove_post_dates() {
add_filter('the_date', '__return_false');
add_filter('the_time', '__return_false');
add_filter('the_modified_date', '__return_false');
add_filter('get_the_date', '__return_false');
add_filter('get_the_time', '__return_false');
add_filter('get_the_modified_date', '__return_false');
} add_action('loop_start', 'jl_remove_post_dates');

}
?>

ha time differences 😛 its 1PM in new zealand

ok in the original code i gave you
<?php
if (is_category(23) )
{
echo ‘ <style>
.entry-date {
display:none;
}
</style>’;
}
?>

when i ping the address 131.230.242.36 it goes to request time out, you should contact the host company if the server is even up or is this a local server ?
was it working before?

it would be good if you could post your link

i would have to see your site to see which classes are working on it

not sure but you might try calling this function inside the conditional loop

http://codex.wordpress.org/Conditional_Tags

<?php
if ( is_user_logged_in()  )
  {
   echo ' <style>

	</style>';
} else {

	echo ' <style>

	html {
    background-color:#FFF !important;
}

	</style>' ;
}
?>

this is my working code

i put my code on top