var utc = new Date().toJSON().slice(0,10).replace(/-/g,'/'); document.write(utc);

If you want to reuse autcvariable (e.g.new Date(utc)), use thereplaceoption, as Firefox and Safari do not recognize dashes date.

var today = new Date(); var dd = String(today.getDate()).padStart(2, '0'); var mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0! var yyyy = today.getFullYear(); today = mm + '/' + dd + '/' + yyyy; document.write(today);