[j0hnik]

var today = new Date();
var hors = today.getHours();
var min = today.getMinutes();
var day = today.getDay();

if(day===0){alert((day+5)*24+hors+":"+min);}
else if(day===1){alert("Сейчас понедельник");}
else{alert((day-2)*24+hors+":"+min);}