rdate 1.4-7 (amd64 binary) in ubuntu dapper

sets the system's date from a remote host
 Rdate displays and sets the local date and time from the host name or address
 given as the argument. It uses the RFC868 protocol which is usually
 implemented as a built-in service of inetd(1).
 .
  Homepage: http://freshmeat.net/projects/rdate/