Yes, I’m aware, just verifying that it wasn’t a comma separated string in a single table.
I would parse out the month, day and year and put them into an integer table in the date/time format as specified in the PAC Control command help for the GetDateTime command. Convert this value to an int64 NTP timestamp using the DateTimeToNtpTimestamp command. Do the same with the current time. Subtract the two int64 values that the Ntp command generates and divide the result by the constant (2^32 * 86400 = 371,085,174,374,400). That should get you the difference in days.
If you can store the NTP timestamp when the work order is generated in an int64 table, that would make things simpler.