Expires
The Expires header contains the date/time after which the
response is considered stale.
Invalid dates, like the value 0, represent a date in the past and mean that the resource is already expired.
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) # header.expires |
Browser compatibility
BCD tables only load in the browser