Without knowing your exact use case / user story, expected report results, and which version of Pega (PRPC) are you using (example: PRPC v6.2sp2, Pega 7.1.6, etc.), it is difficult to provide a specific answer.
In a Report Definition report, you can populate a column of the report using an nested SQL function and Standard functions available in the Pega-RULES:BusinessCalendar library are available which use business day and holiday information.
Something to keep in mind here would be the Pega definition of 'Business Days.' According to Pega Developer Help:
A business day is a day that is not identified as a holiday nor identified as a weekday with no work, on the Schedule tab of a calendar data instance.
Standard functions in the Pega-RULES:BusinessCalendar library use business day and holiday information. For example, you can compute the number of business days (based on a specific calendar) between two dates. Business days are sometimes called work days.
If your application includes multiple calendar data instances, a non-business day for some users may be a business day for others.
Hi All, We too have the same logic to be developed. In RD functions, we were able show the difference between the two date times attributes. But it was not consider the business calendar that had been configured. Any suggestions?