How to change regional settings with PowerShell

Recently I needed to change the regional settings for all the sites and site collection in a SharePoint 2013 farm, so I did it with Powershell.

But also, at the same time I needed to do it for a SPO tenant, so let’s PowerShell!

[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
foreach ($webApplication in Get-SPWebApplication) {
Write-Host
Write-Host "Processing $webApplication"
Write-Host "******************************"

foreach ($site in $webApplication.Sites) {
$webs = $site.AllWebs
Write-Host
Write-Host "Processing $site"
Write-Host "******************************"
foreach ($web in $webs) {
$culture=[System.Globalization.CultureInfo]::CreateSpecificCulture("es-es")
$web.Locale=$culture
$web.Update()
$web.Dispose()
Write-Host $web.Url
}
}
}

#If you need to change the timezone and local id in SharePoint Online, you can do it using the following:

#This is to change the LocalID
#First, set up your ClientContext in the normal manner:
$Password = ConvertTo-SecureString -String "yourPassword" -AsPlainText -Force;
$ctx = New-Object Microsoft.SharePoint.Client.ClientContext("https://tenant.sharepoint.com/sites/yourSiteCollection");
$ctx.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials("admin@company.onmicrosoft.com", $Password);
#Now we need to set up our target web site object:
$web = $ctx.Web;
$ctx.Load($web);
$ctx.ExecuteQuery();
#Next, update the settings. In this example, I’m setting the LocaleId to 2057 (en-UK)
$web.RegionalSettings.LocaleId = 2057;
$web.Update();
#Finally, run the ExecuteQuery method to apply the changes:
$ctx.ExecuteQuery();

#The following is to change the zoneID for personal sites
if($user.LoginName.Contains('@'))
{
$persweb=$user.LoginName.Replace(".","_").Replace("@","_")
$persweb=$myhost+"/personal/"+$persweb
Write-Host $persweb
Set-SPOUser -Site $persweb -LoginName $username -IsSiteCollectionAdmin $true
$AdminUrl=$persweb

Set-SPoUserRegionalSetings -Username $Username -AdminPassword $AdminPassword -Url $AdminUrl -TimeZoneID $TimeZoneID
}

If you need to know which time zone ID is your region, visit: https://gist.github.com/mj1856/9542228 to check it

And If you need to check your local ID, visit: https://msdn.microsoft.com/en-gb/goglobal/bb964664

Ref: https://blogs.technet.microsoft.com/fromthefield/2015/04/13/office-365-change-the-locale-of-all-onedrive-for-business-sites-using-powershell/
https://gallery.technet.microsoft.com/Update-the-time-zones-in-67a5644a

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