date format

[coollehavre]

Hi,
i'm using a French Excel and if i link a table to powerpivot, he displays the correct date (in format DD/MM/YY)

But, if i add some new data in Excel, in my linked table, he displays the date in PowerPivot, in a wrong format (MM/DD/YY)

Is it a bug ? have you an idea ?

Thanks

Laurent