Workfront Proof not recognizing Workfront calendar

After the holidays, our team has noticed Workfront Proof did not recognize Workfront's calendar... does anyone know if there is a way to do this? Example, our company had Thursday and Friday of last week off. Those days are marked in the Workfront calendar settings. However, the proof showed it was two days late because it did not recognize Thursday and Friday were not 'regular' business days. Whitney Hawkins Spectrum Brands - Pet Home and Garden Care