Excel XML, how can I get Excel to display my DateTime field in yyyy-MM-dd format?

Question

I generate an XML file through C#, and the relevent part looks like this

    2009-01-18T00:00:00.000         


        

Answer 1

In the section add

then mark your cell with the style:

2009-01-21T00:00:00.000

Alternatively, open your XML file in Excel, make the change you want, re-save it as XML, then look to see what changed.