The default time for a Cookie to expire is 30 minutes.

The default Expires value for a cookie is not a static time, but it creates a Session cookie. This will stay active until the user closes their browser/clears their cookies. You can override this as required.

The default Expiration Period for a Cookie is 30 minutes and the default Expiration Period for a Session is 20 minutes.

30 minute is the default timeout of cookies ,we can set timeout by using expire keyword