The insertion of a date that’s already passed into the Expires meta tag tells the browser that the cached copy of the page is always out of date. Upon encountering this tag, the browser usually won’t cache the page. Although the Pragma: no-cache meta tag isn’t guaranteed, it’s a fairly well-supported convention that most web browsers follow. However, the two issues associated with this approach, which we’ll discuss below, may prompt you to look at the alternative solution.