h1. Known time description

h2. Double Time ranges : date from 01/01/1970 to 01/01/2100

* seconds from 01/01/1970 00:00:00  : 
* milliseconds from 01/01/1970 00:00:00  : 
* seconds from 01/01/0000 00:00:00  : 
* milliseconds from 01/01/0000 00:00:00 :
* seconds from 01/01/2000 00:00:00  :  
* milliseconds from 01/01/2000 00:00:00  :