Date Formatting all over the place

Hi all

I am totally new to scripting and have spent ages on writing the below.

It is all working apart from the date format.

When creating the .CSV files excel will convert 1/2 the dates UK and 1/2 USA no matter what format I choose.

Is there any way to add to the below script a UK format date? If someone can help and show me where to put the command it would be most helpful.

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Import-Module ActiveDirectory

function Get-ADUsersLastLogon()

{

$dcs = Get-ADDomainController -Filter {Name -like"*"}

$users = Get-ADUser -searchbase "OU=Users" -SearchScope OneLevel -Filter *

$time = 0

$exportFilePath ="C:\lastlogin.csv"

$columns = "name,username,datetime"

Out-File -filepath $exportFilePath -force -InputObject $columns

foreach($user in $users)

{

foreach($dc in $dcs)

 {

$hostname = $dc.HostName

$currentUser = Get-ADUser $user.SamAccountName | Get-ADObject -Server $hostname -Properties lastLogon

if($currentUser.LastLogon -gt $time)

{

$time = $currentUser.LastLogon

}

}

$dt = [DateTime]::FromFileTime($time)

$row = $user.Name+","+$user.SamAccountName+","+$dt

Out-File -filepath $exportFilePath -append -noclobber -InputObject $row $time = 0 } } Get-ADUsersLastLogon