Install cl-simple-date by entering the following commands in the terminal:
sudo apt update sudo apt install cl-simple-date
Common Lisp types for dates, timestamps, and intervals
Simple-date provides types (CLOS classes) for dates, timestamps, and intervals similar to the ones SQL databases use, in order to be able to store and read these to and from a database in a straighforward way. A few obvious operations are defined on these types. . The most glaring defect of this library is its ignorance of time zones. It pretends the whole world lives in UTC. Use with care. . When this library is loaded after CL-postgres, it will register suitable SQL readers and writers for the associated database types.