To change the list of non-working business dates
Typically, you define the list of holidays and other non-working dates at the beginning of the calendar year, before marketing calendar details are set. However, you might need to change the set of non-working days after dates for tasks, projects, and programs are already set.
In this case, the process for changing the list of non-working business days is as follows.
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If your changes affect any projects or tasks, use the Non-working Business Dates summary page to notify affected project owners.