https://datatracker.ietf.org/doc/draft-mathewson-no-gmtunixtime/
draft-mathewson-no-gmtunixtime-00 - Deprecating gmt_unix_time in TLS
This memo deprecates the use of the gmt_unix_time field for sending the current time in all versions of the TLS protocol's handshake. A rationale is provided...
unix timedraftmathewson