Apr 1, 2011 April Fool's Day
Apr 1, 2011 Pascua Florida Day observed
Apr 2, 2011 World Autism Awareness Day
Apr 2, 2011 Pascua Florida Day
Apr 4, 2011 United Nations' Mine Awareness Day
Apr 6, 2011 National Tartan Day
Apr 7, 2011 United Nations' World Health Day
Apr 7, 2011 Day of Remembrance of the Victims of the Rwanda Genocide
Apr 12, 2011 International Day of Human Space Flight
Apr 12, 2011 National Library Workers' Day
Apr 15, 2011 Father Damien Day
Apr 15, 2011 Emancipation Day observed
Apr 16, 2011 Emancipation Day
Apr 18, 2011 Patriot's Day
Apr 18, 2011 Boston Marathon
Apr 19, 2011 Passover (first day)
Apr 20, 2011 Chinese Language Day
Apr 21, 2011 Maundy Thursday
Apr 21, 2011 San Jacinto Day
Apr 22, 2011 Orthodox Good Friday
Apr 22, 2011 Oklahoma Day
Apr 23, 2011 Holy Saturday
Apr 23, 2011 Orthodox Holy Saturday
Apr 23, 2011 World Book and Copyright Day
Apr 23, 2011 English Language Day
Apr 24, 2011 Orthodox Easter
Apr 24, 2011 Easter Sunday
Apr 25, 2011 Orthodox Easter Monday
Apr 25, 2011 World Malaria Day
Apr 25, 2011 Easter Monday
Apr 25, 2011 Confederate Memorial Day
Apr 25, 2011 Confederate Memorial Day
Apr 25, 2011 Confederate Heroes' Day
Apr 26, 2011 Last day of Passover
Apr 26, 2011 World Intellectual Property Day
Apr 26, 2011 Confederate Heroes' Day
Apr 27, 2011 Administrative Professionals Day
Apr 28, 2011 World Day for Safety and Health at Work
Apr 28, 2011 Take our Daughters and Sons to Work Day
Apr 29, 2011 Day of Remembrance for all Victims of Chemical Warfare