Hi, I believe that is a limitation of the C libraries that manage the dates calculations. You should consider to create a transformed column in a copy of your Excel file having the dates summed a suitable value (for example 1000 years), make that column the time series one and the original dates as labels (converted to text). Hope this would help, Hélio On Tue, Aug 13, 2013 at 9:31 PM, Cristián Arturo Ducoing Ruiz < cducoingr(a)gmail.com&gt; wrote: