It seems it's using RFC2109 https://tools.ietf.org/html/rfc2109#section-10.1.2
``` 10.1.2 Expires and Max-Age Netscape's original proposal defined an Expires header that took a date value in a fixed-length variant format in place of Max-Age: Wdy, DD-Mon-YY HH:MM:SS GMT ``` [ Full content available at: https://github.com/apache/couchdb/issues/1610 ] This message was relayed via gitbox.apache.org for [email protected]
