MailChimp sign up popup on click + clear expire cookie

index.html

<button id="open-popup">Sign Up</button>

<script type="text/javascript" src="//s3.amazonaws.com/downloads.mailchimp.com/js/signup-forms/popup/embed.js" data-dojo-config="usePlainJson: true, isDebug: false"></script>

<script>
function showMailingPopUp() {
  var config={"baseUrl":"mc.us5.list-manage.com","uuid":"0b1e10820775a3f...","lid":"738208..."}
  
  require(["mojo/signup-forms/Loader"], function(L) {
    L.start(config)
  })
  
 document.cookie = "MCEvilPopupClosed=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/";
}

document.getElementById("open-popup")
.addEventListener('click', function(event) {
  showMailingPopUp()
})
</script>

hello how i can expire cookie after 1 min now it's 1 year send me code please