Age

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

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

Age: <delta-seconds>

<delta-seconds>

A non-negative integer that is time in seconds the object was in a proxy cache.

Age: 24

• Cache-Control
• Expires