Response · Response header
Date
When the response was generated.
What is Date?
The Date header records the moment the response left the origin server. Used by caches to compute freshness and Age.
Typical usage
Set automatically by web servers.
Examples
Date: Wed, 21 Oct 2025 07:28:00 GMTSpecification
RFC 9110 §6.6.1
Related headers
Age
How many seconds the response has been in a shared cache.
Expires
Legacy: an absolute HTTP date when the response becomes stale.
Location
The redirect target (3xx) or newly created resource URL (201).
Retry-After
How long the client should wait before retrying.
Server
Identifies the server software.
Allow
Which HTTP methods the target resource supports.