display content after specified date

wp-countshow

/*
Countdown timer shortcode, display content after specified date

use this : [cdt month="10" day="17" year="2011"]
This is content that will only be shown after a set number of days.
*/
function content_countdown($atts, $content = null){
  extract(shortcode_atts(array(
     'month' => '',
     'day'   => '',
     'year'  => ''
    ), $atts));
    $remain = ceil((mktime( 0,0,0,(int)$month,(int)$day,(int)$year) - time())/86400);
    if( $remain > 1 ){
        return $daysremain = "<div class=\"event\">Just <b>($remain)</b> days until content is available</div>";
    }else if($remain == 1 ){
	return $daysremain = "<div class=\"event\">Just <b>($remain)</b> day until content is available</div>";
    }else{
        return $content;
    }
}
add_shortcode('cdt', 'content_countdown');