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If you specify a value other than *DAYS for the *Duration Type parameter, CA 2E bases its calculations on an "everyday" calendar in which all seven days of each week are included in the calculations. Date Lists and *INCLUDED/*EXCLUDED selections are not used by definition; so all issues associated with these parameters can be ignored.
The resulting "month-centric" calculations are not always mathematically accurate because the units involved are not equally long. The results of such calculations are often approximate because CA 2E adjusts them to common sense standards rather than to mathematical accuracy. For example, December 31, 1995 (*Date2) incremented by 2 months (*Duration) returns a result of February 29, 1996 (*Date1) rather than the arithmetically correct February 31, 1996!
The remainder of this section gives examples of specific assumptions CA 2E makes to adjust results to common sense standards and to produce consistent results.
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