Unix Time Stamp

In our project, Trac is saving datetime data as Integer type fields in database. That is called unix time stamp.
The unix time stamp is a way to track time as a running total of seconds. This count starts at the Unix Epoch on January 1st, 1970. Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch. This is very useful to computer systems for tracking and sorting dated information in dynamic and distributed applications both online and client side.

String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date (epoch*1000));