Age header

The HTTP Age {{Glossary("response header")}}header indicates the time in seconds for which an object was in a proxy cache.

The header value is usually close to zero. If the value is 0, the object was probably fetched from the origin server; otherwise, the value is usually calculated as a difference between the proxy's current date and the {{HTTPHeader("Date")}}Date general header included in the HTTP response.

Header type	{{Glossary("[Response header")}}header](https://developer.mozilla.org/en-US/docs/Glossary/Response%20header)

Syntax

Age: <delta-seconds>

Directives

• <delta-seconds>
  • : A non-negative integer that represents the time in seconds for which the object was in a proxy cache.

Examples

Age: 24

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{HTTPHeader("Cache-Control")}}Control
• {{HTTPHeader("Expires")}}Expires