cl-epoch

https://github.com/mcandre/cl-epoch.git

git clone 'https://github.com/mcandre/cl-epoch.git'

(ql:quickload :cl-epoch)
★3

cl-epoch - Converts between CL Universal Time and UNIX Epoch Time

EXAMPLE

$ clisp example.lisp
The current UNIX Epoch time is 1342211409