date

server

Recommends the preferred rendering engine (often a backward-compatibility mode) to use to display the content.

The natural language or languages of the intended audience for the enclosed content.

Prevents Internet Explorer from MIME-sniffing a response away from the declared content-type.

Block requests if type 'style' or 'script'.

Inform all caching mechanisms from server to client whether they may cache this object.

May be stored by any cache but must be validated by the server.

The time at which the response is considered stale.

Control options for the current connection and list of hop-by-hop response fields.

Indicate the connection should be upgraded from HTTP to HTTPS.

The client or server would like to close the connection.

This and all future requests should be directed to the given URI. The request method can change.