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Remove datetime older than "12 month" (ex)

    jQuery('.editions-wrapper .posts-list li').each(function() {
        var d1 = jQuery(this).find('time').attr('datetime');
        var d2 = new Date();
        var m = new Date(d1);
        var timeDiff = Math.abs(d2.getTime() - m.getTime());
        var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24));
           if ( diffDays >= 365) {
               jQuery(this).remove();
           }       
     });
code type: 
js
Taken from: 
https://stackoverflow.com/questions/3224834/get-difference-between-2-dates-in-javascript