You can find information on how to covert the Epoch Unix timestamp on: https://www.unixtimestamp.com/
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 at UTC. Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch.
To convert it to date and time you will need to use the following syntax:
timeStamp(Makedate(1970,1,1)+ 1668085945 /24/60/60 + Date((120/24/60) , 'YYYY-MM-DD hh:mm:ss'))