gistfile1.php

<?php
// The current time in seconds since Unix Epoch
$current_time = date( 'U' );
// The post time in seconds since Unix Epoch
$post_time    = get_the_time( 'U' );
// Calculate how many days ago the post was posted
$days_ago = round( ( $current_time - $post_time ) / ( 60*60*24 ) );

if ( $days_ago >= 60 ) {
  // Do something if the post is older than 60 days
} else {
  // Do something if the post is younger than 60 days
}
?>