HTTP/1.1 Operation without a Clock

Document Type Expired Internet-Draft (individual)
Authors Jeffrey Mogul  , Richard Gray  , Scott Lawrence 
Last updated 1997-04-22
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo describes a problem with the current Proposed Standard for HTTP/1.1 found as a result of implementation experience. A web server may be implemented in an embedded system as a network user interface. Often the embedded system is one which has no other use for a real-time clock, and/or the web interface is being added to an existing device which has no clock. Without a clock, no accurate HTTP Date header can be generated. This memo examines the implications of this situation for the operation of HTTP/1.1 origin servers, proxies, and clients, and proposes changes to the HTTP/1.1 specification to permit compliant operation in such systems.


Jeffrey Mogul (
Richard Gray (
Scott Lawrence (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)