suppress the invoice approval escalation process during holidays

Summary:

We would like to suppress the invoice approval escalation process during holidays. This is when the office is closed, so we do not want the invoice to escalate past someone when the office is closed. New Years Day Memorial Day 4th of July Labor Day Thanksgiving day Christmas Eve and Christmas Day

one suggestion is to extend no of days in the escalation section

other is to use Manage transaction calendar. But how do i associate transaction calendar to Invoice approval workflow

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