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.
| Header type | Response header |
|---|---|
| Forbidden header name | no |
Age: <delta-seconds>
A non-negative integer, representing time in seconds the object has been in a proxy cache.
Age: 24
| Specification | Title |
|---|---|
| RFC 7234, section 5.1: Age | Hypertext Transfer Protocol (HTTP/1.1): Caching |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Age