Estou tentando obter resultados do mongodb usando nodejs / mongoos

var dateStr = new Date(year,month,day,0,0,0);
var nextDate = new Date(year,month,day,23,59,59);

GPSData.find({"createdAt" : { $gte : new ISODate(dateStr), $lte:  new ISODate(nextDate) }}, function(err, data) {
  if(err)
    console.log(err); 
});

Error:ISODate is not defined