A one-business-day example
Start on an eligible Monday and add one business day. With the start excluded, the result is Tuesday. With the start included, Monday itself satisfies the one-day count.
When the start is excluded by the calendar
If the starting date is a weekend or closure, selecting Include start does not make it eligible. DueRule records the reason and continues in the selected direction.
Use the controlling rule: phrases such as “within,” “after,” “from,” and “beginning on” can carry domain-specific meanings. This guide explains software behavior, not legal interpretation.
Questions people ask
What does include start mean?
The starting date can satisfy the first counted business day, but only if the selected calendar treats it as a business day.
Does an excluded start consume a count?
No. It appears in the exclusion trace, and the calculation continues until the requested number of eligible dates is reached.
What is the default?
Add and Subtract exclude the start. Between excludes the start and includes the end.