SharePoint Online: How to Change Date Format to “DD/MM/YYYY”?

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
 
#Config parameters for SharePoint Online Site URL and Locale
$SiteURL = "https://Crescent.sharepoint.com"
$LocaleID ="2057" #English - United Kingdom
 
#Get Credentials to connect
$Cred= Get-Credential
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)
   
#Set up the context
$Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl)
$Ctx.Credentials = $credentials

#Get Regional Settings of the Web
$Web = $Ctx.Web
$Ctx.Load($web)
$Ctx.Load($Web.RegionalSettings)
$ctx.ExecuteQuery()
 
#Update the LocaleID of the site
$Web.RegionalSettings.LocaleId = $LocaleID
$Web.Update()
$Ctx.ExecuteQuery() 

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
 
#function to change Locale in regional settings of a SharePoint Online site
Function Set-SPOLocale([String]$SiteURL,[String]$LocaleID, [PSCredential]$Cred)
{ 
     Try
     {
        #Set up the context
        $Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
        $Ctx.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)
   
        #Get Regional Settings of the Web
        $Web = $Ctx.Web
        $Ctx.Load($web)
        $Ctx.Load($Web.RegionalSettings)
        $ctx.ExecuteQuery()
 
        #Update the LocaleID of the site
        $Web.RegionalSettings.LocaleId = $LocaleID
        $Web.Update()
        $Ctx.ExecuteQuery()
 
        Write-host -f Green "Locale has been updated for "$Web.Url
 
        #Get all subsites of the web
        $Ctx.Load($Web.Webs)
        $Ctx.executeQuery() 
        #Iterate through each subsites and call the function recursively
        Foreach ($Subweb in $Web.Webs)
        {
            #Call the function to set Locale for the web
            Set-SPOLocale -SiteURL $Subweb.URL -LocaleID $LocaleID -Cred $Cred
        }
    }
    Catch [System.Exception]
    {
        Write-Host -f Red "Error:"$_.Exception.Message
    }
} 
 
#Config parameters for SharePoint Online Admin Center and Locale description
$AdminSiteURL = "https://Crescent-admin.sharepoint.com"
$LocaleID ="2057"
 
#Get credentials to connect to the SharePoint Online Admin Center
$Credentials = Get-Credential
 
#Connect to SharePoint Online Tenant Admin
Connect-SPOService -URL $AdminSiteURL -Credential $Credentials
 
#Get all Site Collections and Iterate through
Get-SPOSite -Limit ALL | ForEach-Object { 
    Set-SPOLocale -SiteURL $_.URL -LocaleID $LocaleID -Cred $Credentials
}