RadHtmlChart set YAxis on Date Rages for RangeSeriesItem

Hi,

 Can I set date range for RangeSeriesItem inside of RangeBarSeries for RadHTML Chart something like this

can I set 

  RangeSeriesItem rsi = new RangeSeriesItem();
        rsi.From = DateTime.Now.AddDays(-1);
        rsi.To = DateTime.Now.AddDays(1);
        bbs.SeriesItems.Add(rsi);

instead of setting decimal values in From and To for Range series Item??