how can i remove the time from the date when shown on the highchart.the data (dates) are received from a twitter get request and saved into an array.

```
    for (var i in array) {
        dateArray.push(array[i].date);
            }  
    highchart(dateArray);

```

an example of date shown on the graph: Sat,04 Aug 2012 19:35:02 +0000