Sources: KPNX-12, 110th Congress Legislation, and USA public holidays. U.S. Senator Daniel Inouye (D-Hawaii) has introduced Bill S.1852 that would create a special holiday, Native American Heritage Day, honoring the contributions of Native Americans make, on the day after Thanksgiving.
Analysis: A close reading of the proposed legislation is not very enlightening as to whether federal civil servants will get the day off or not (recall that the US Government is only allowed to specify public holidays for federal civil servants). In any event, as Thanksgiving always occurs on a Thursday, many people already take the day after Thanksgiving off now, either to travel for the traditional family get-together (Thanksgiving is the most important family holiday in the USA), or to go hunting, or to get a head-start on Christmas shopping. It is therefore not advisable to try to conduct business on that day, whether this bill passes into law or not.