gives the date/time after which the response is considered stale.
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Description
gives the date/time after which the response is considered stale.
Syntax
Expires: Tue, 18 Aug 2026 12:00:00 GMT
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Frequently asked questions
gives the date/time after which the response is considered stale.
It is classified as a response header and can appear in requests or responses depending on context.
Sources & standards
Updated 2026-09-13
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