Get Last Modified Date without downloading the file in PowerShell

Compatibility: v5.x

$zipfile = "https://www..../xyz/test.zip"

add-type @"

    using System.Net;

    using System.Security.Cryptography.X509Certificates;

    public class TrustAllCertsPolicy : ICertificatePolicy {

        public bool CheckValidationResult(

            ServicePoint srvPoint, X509Certificate certificate,

            WebRequest request, int certificateProblem) {

            return true;

        }

    }

"@
$AllProtocols = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'

[System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols

[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy
#$res = Invoke-WebRequest -Uri $zipfile
$webRequest = [System.Net.HttpWebRequest]::Create($zipfile)

$webRequest.Method = "GET"

[System.Net.HttpWebResponse]$webResponse = $webRequest.GetResponse()
Write-Output $webResponse.LastModified