Patriots' Day Dates Date of observation: April 19, 2010.  Save as Bookmark  Send this Page to Friend. Patriots' Day Home   History of Patriots' Day   Patriots' Day and Tax Day   Patriots' Day Dates   Patriots' Day Observances   Sporting Events on Patriots' Day   Mon / Apr 19 / 2010 / Patriot's Day / State holiday Mon / Apr 18 / 2011 / Patriot's Day / State holiday Mon / Apr 16 / 2012 / Patriot's Day / State holiday Mon / Apr 15 / 2013 / Patriot's Day / State holiday Mon / Apr 21 / 2014 / Patriot's Day / State holiday Mon / Apr 20 / 2015 / Patriot's Day / State holiday (Weekday / Date / Year / Name / Holiday type respectively)