↑ arvau

MDN / Expires header

The HTTP Expires contains the date/time after which the response is considered expired in the context of HTTP caching.

The value 0 is used to represent a date in the past, indicating the resource has already expired.

If there is a header with the max-age or s-maxage directive in the response, the Expires header is ignored.

  </th>
  <td>Yes</td>
</tr>

Syntax

Expires: <day-name>, <day> <month> <year> <hour>:<minute>:<second> GMT

Directives

  • <day-name>

    • : One of Mon, Tue, Wed, Thu, Fri, Sat, or Sun (case-sensitive).

    <day>

    • : 2 digit day number, e.g., “04” or “23”.

    <month>

    • : One of Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec (case sensitive).

    <year>

    • : 4 digit year number, e.g., “1990” or “2016”.

    <hour>

    • : 2 digit hour number, e.g., “09” or “23”.

    <minute>

    • : 2 digit minute number, e.g., “04” or “59”.

    <second>

    • : 2 digit second number, e.g., “04” or “59”.

    GMT

    • : Greenwich Mean Time. HTTP dates are always expressed in GMT, never in local time.

Examples

Expires: Wed, 21 Oct 2015 07:28:00 GMT

Specifications

Browser compatibility

See also