(below an example in my 'french' computer)
$date = Get-Date
$culture = New-Object System.Globalization.cultureinfo("en-US") $date
samedi 4 mai 2013 09:55:18
$date.Tostring("dddd",$culture)
Saturday
$date.Tostring("D",$culture)
Saturday, May 04, 2013
$culture = New-Object System.Globalization.cultureinfo("fr-FR") $date
samedi 4 mai 2013 09:55:18
$date.Tostring("dddd",$culture)
samedi
$date.Tostring("D",$culture)
samedi 4 mai 2013
Culture List here or in this old cultureinfo Framework information.To play with different pattern culture go to datetimeformatinfo