When you do a CDATE on the PRO-IV internal date of 1, you will get the 1st Jan 1800. Each day then increments PRO-IV's internal counter by 1. So today it's been 75399 days since the counter started.
I would assume PRO-IV created this structure to allow easy date ordering within PRO-ISAM files when specifying dates as keys to tables etc.
The version of PRO-IV we're using (Version : 5.0000 1.0.9) has a maximum of 438291 or 31/12/2999
So watch out for that 3K bug !!
