Date and Time:
This REXX program was created in February of 2020, wich can be launched by calling the EXEC from the command line with "TSO IMPLE", or another given name if desired.
The tool obtains all the version names of a GDG file in order to search in some of them, to check if the date in the first row matches with the today's date or the previous date. The purpose is to see what JCLs have been implemented the same day or the previous day.
To figure out the previous date, I created a verification that recognizes if the current year is a leapyear, in order to get the previous day correctly when the today's date is the first day of the month. The result is a quick prompt message saying wheter the JCL was implemented that or not.