Expires
The Expires HTTP header contains the date/time after which the
response is considered expired.
Invalid expiration dates with value 0 represent a date in the past and mean that the resource is already expired.
Note: If there is a Cache-Control header
with the max-age or s-maxage directive in the response,
the Expires header is ignored.
| Header type | Response header |
|---|---|
| Forbidden header name | no |
| CORS-safelisted response header | yes |
Syntax
Expires: <http-date>
Directives
- <http-date>
-
An HTTP-date timestamp.
Examples
Expires: Wed, 21 Oct 2015 07:28:00 GMT
Specifications
| Specification |
|---|
| Hypertext Transfer Protocol (HTTP/1.1): Caching (HTTP/1.1 Caching) # header.expires |
Browser compatibility
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