Federal Reserve Bank of Dallas. "Holidays, Circular No. 80-237," District Notices (Federal Reserve Bank of Dallas) (December 17, 1980). https://fraser.stlouisfed.org/scribd/?item_id=541172&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19801217_no80-237.pdf&start_page=1, accessed on September 20, 2017.
Revised Schedule of Official Holidays and Business Hours of All Federal Reserve Banks and Branches for the Year 1981