Data import date field

I have one csv to import with date fields but when I run the Import in zoho It doesn't work.

For example to import de field "date" 14/08/2008?????

It doen't work with 14/08/2008 or 14-08-2008 or 14/08/08

What's the format I have to use in my csv???

Thanks a lot.

Sergio