EPOCH(DATETIME$)
Returns the epoch number (number of seconds that have elapsed since midnight GMT on January 1, 1970) for the supplied DATETIME$ string.
The format for DATETIME$ is “dd-mm-yyyy hh:mm:ss”, “dd-mm-yy hh:mm:ss”, or “yyyy-mm-dd hh:mm:ss”,. Use NOW to get the epoch number for the current date and time, i.e. PRINT EPOCH(NOW)