The Holidays module below is configured to calculate dates from 2007 to 2020.  The date patterns entered here reflect U.S. Federally observed holidays.  To display dates for a different year, select the year from the drop-down list.  You may notice that some dates move to the appropriate day of the week for different years, in order to fall on an "observed" weekday.  You may configure the particular holiday pattern to suit the needs of your site.  As of version 1.1, the Holidays module is fully localizable.