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Editorial Team
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Asked: 2026-05-26T01:36:05+00:00

If a HTTP response that returns both Expires and max-age indications which one is

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If a HTTP response that returns both Expires and max-age indications which one is used?

Cache-Control: max-age=3600
Expires: Tue, 15 May 2008 07:19:00 GMT

Considering that each one refers to a different point in time.

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  1. Editorial Team

    See this answer:

    Difference between three .htaccess expire rules

    If a response includes both an Expires header and a max-age directive,
    the max-age directive overrides the Expires header, even if the
    Expires header is more restrictive. This rule allows an origin server
    to provide, for a given response, a longer expiration time to an
    HTTP/1.1 (or later) cache than to an HTTP/1.0 cache. This might be
    useful if certain HTTP/1.0 caches improperly calculate ages or
    expiration times, perhaps due to desynchronized clocks.

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