Calendar for April 2011 (United States)

Holidays and Observances: 1: April Fool's Day, 1: 'Pascua Florida Day' observed (Florida),
2: World Autism Awareness Day, 2: Pascua Florida Day (Florida), 4: Mine Awareness Day,
6: National Tartan Day, 7: United Nations' World Health Day,
7: Day to Remember Rwanda Genocide Victims, 12: International Day of Human Space Flight,
12: National Library Workers' Day, 15: Father Damien Day (Hawaii),
15: 'Emancipation Day' observed (District of Columbia),
16: Emancipation Day (District of Columbia), 17: Palm Sunday, 18: Passover Eve, 18: Tax Day,
18: Patriots' Day (Maine, Massachusetts), 19: Passover (first day),
20: Chinese Language Day, 21: Maundy Thursday, 21: San Jacinto Day (Texas),
22: Orthodox Good Friday, 22: Earth Day, 22: Good Friday (Many regions),
22: Oklahoma Day (Oklahoma), 23: Holy Saturday, 23: Orthodox Holy Saturday,
23: World Book and Copyright Day, 23: World Spanish Language Day, 23: English Language Day,
24: Orthodox Easter, 24: Easter Sunday, 25: Orthodox Easter Monday, 25: World Malaria Day,
25: Easter Monday, 25: Arbor Day (Wyoming), 25–26: Confederate Memorial Day (Mississippi),
25: Confederate Memorial Day (Alabama), 25: Confederate Memorial Day (Georgia),
26: Last Day of Passover, 26: World Intellectual Property Day,
27: Administrative Professionals Day, 28: International Girls in ICT Day,
28: World Day for Safety and Health at Work, 28: Take our Daughters and Sons to Work Day,
29: Day to Remember Chemical Warfare Victims, 29: Arbor Day (Nebraska),
29: Arbor Day (Delaware)