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/HTTP

Age

The Age header contains the time in seconds the object has been in a proxy cache.

The Age header is usually close to zero. If it is Age: 0, it was probably just fetched from the origin server; otherwise It is usually calculated as a difference between the proxy's current date and the Date general header included in the HTTP response.

Syntax

Age: <delta-seconds>

Directives

<delta-seconds>

A non-negative integer, representing time in seconds the object has been in a proxy cache.

Examples

Age: 24

Specifications

Specification Title
RFC 7234, section 5.1: Age Hypertext Transfer Protocol (HTTP/1.1): Caching

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Age Yes 12 Yes Yes Yes Yes
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
Age Yes Yes Yes Yes Yes Yes

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Age