If-Modified-Since HTTP Header

Common values for this header

• 1970-01-01
• Mon, 26 Jul 1997 05:00:00 GMT
• Mon, 13 Mar 2017 11:33:00 GMT
• 0
• Wed, 19 Jul 2017 07:21:16 +0100

Related headers

• Content-Type
• Date
• Content-Length
• Cache-Control
• Pragma
• Server
• Connection
• Expires
• Last-Modified
• Set-Cookie
• Vary
• Content-Encoding
• X-Powered-By
• Access-Control-Allow-Origin
• Access-Control-Allow-Methods
• Access-Control-Allow-Headers
• Keep-Alive
• Content-Language
• Strict-Transport-Security
• Accept-Ranges
• X-Ua-Compatible
• Access-Control-Allow-Credentials
• Access-Control-Max-Age
• X-Application-Context
• X-Npl-Signature

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