9 a.m. One hundred immigrants, standing before a copy of the Declaration of Independence, will take a citizenship oath at the The New-York Historical Society, 170 Central Park West at 77th Street.
9 a.m. Timberland and SSBx volunteers will help clean up Hunts Point as part of Earth Day celebration at the Hunts Point Riverside Park, Lafayette Avenue and Edgewater Road.
9 a.m. Congresswoman Nita Lowey, Sen. Charles Schumer, and the Army Corp of Engineers will tour flood damaged areas of Westchester County at the Mamaroneck Village Hall at the Regatta, 123 Mamaroneck Avenue, Mamaroneck.
9:15 a.m. P.S. 321 students will hold the Go Green/Healthy Choices Walkathon in Prospect Park, 3rd Street and West Drive, in Brooklyn.
10 a.m. Teamsters President James Hoffa will swear in Gregory Floyd as president of Local 237 at the Teamsters Local 237 Headquarters, 216 West 14th Street.
10 a.m. Council Member Tony Avella will be principal for a day at P.S. 169, 18-25 212th Street, in Bayside, Queens.
11 a.m. Youth members and staff from Girls Educational & Mentoring Services and Assembly Member William Scarborough will call for an end to the criminalization of sexually exploited children on the City Hall steps.
11 a.m. Amnesty International activists will hold a panel discussion and rally to protest Darfur atrocities at the St. Bartholomew’s Church, 109 East 50th Street.
Noon. The MTA will celebrate the public transportation’s role as the “pollution solution” at an Earth Day celebration at 44th Street and Vanderbilt Avenue.
Noon. Columbia University Amnesty International and the Falun Dafa Club will host a forum on organ harvesting and human rights violations in China at Columbia’s Uris Hall 301, Broadway and 116th Street.
12:30 p.m. A graduation ceremony will be held for an additional 27 law enforcement officers who will be deployed to the city’s homeless shelters at the John Jay College of Criminal Justice Peace Officer Training Academy, 555 West 57th Street between 10th and 11th avenues.
12:46 p.m. John Yoo, former deputy assistant attorney general for the U.S. Department of Justice, will speak about media coverage of the war on terror at the New York Law School, 57 Worth Street.
6 p.m. The New Jersey Right to Life Annual Banquet dinner will feature Sen. Sam Brownback, Congressman Chris Smith and Ann Coulter at the Sheraton at Woodbridge Place in Islin, New Jersey.
John McCain fundraises in Tucson, Arizona.
Barack Obama campaigns in Boston.