24 October 2009 HTTP Cookies: What's the difference between Max-age and Expires? Quick Answer: Expires sets an expiry date for when a cookie gets deleted Max-age sets the time in seconds for when a cookie will be deleted (use this, it’s no longer 2009) Internet Explorer (ie6, ie7, and ie8) does not support “max-age”, while (mostly) all browsers support expires Max-age vs Expires, let’s dive in a l