8 a.m. Port Authority Superintendent Samuel Plumeri speaks at F.B.I. and T.S.A. terrorism and transportation conference; Sheraton Hotel, 811 Seventh Ave.
9:30 a.m. City Council Hearing on “Alternative Energy Sources and New York City’s Electricity Grid: Potential, Challenges and Policy Directions”; Hunter College; West Building; 8th Floor Faculty Dining Room, Lexington Ave and E. 68th St.
9:30 a.m. IFCO-Pastors for Peace support Reverend Lucius Walker as he appears before a New York State judge on contempt charges related an investigation by the Special Commissioner of Investigation for the New York City Department of Education regarding travel to Cuba by high school students; 60 Centre St. Room 130.
10 a.m. Transportation Commissioner Janette Sadik-Khan and Transportation Alternatives Director present 2008 Bicycle Friendly Business Awards; One Madison Ave.
10:30 a.m. Council Member Tony Avella joins kids at last day of free sports and arts summer program; P.S. 79, 147-27 15th Drive, Whitestone.
10:30 a.m. Republican Assembly candidates demand greater spending accountability from the M.T.A.; southeast corner of Fulton Street and Broadway, Manhattan.
11 a.m. Assemblyman Jose Peralta denounces proposed M.T.A. fare hikes as hurtful to seniors and calls for State Legislature oversight; 108th Street and 39th Avenue, Queens.
11 a.m. Organizers of “New Era Republicans and Democrats Unite for Obama” hold press conference; Sylvia’s Restaurant, 328 Lenox Ave.
11:30 a.m. Verizon workers picket before weekend strike deadline; 140 West St., Manhattan; 4:30 p.m. 175 3rd St., at Third Avenue, Brooklyn.
Noon. Save Darfur Coalition marks failure of the Darfur peacekeeping mission by presenting a helicopter to the U.N. to demonstrate availability of much needed equipment; Second Avenue and East 47th Street.
Noon. Elected officials voice concern about the impact of rising oil and gas prices on working class Latinos; West 43rd Street and Broadway.
Noon. Codepink display of children’s shoes representing Iraqi war dead; Foley Square, 111 Worth St.
1 p.m. Democratic Congressional candidate Steve Harrison denounces proposed Gravesend waste transfer station; Bensonhurst Park, south of the Belt Parkway, end of Bay Parkway near former Caesar’s Bay Bazaar.
1 p.m. Council member Hiram Monserrate joins funeral procession in honor of Army Staff Sgt. Alex Jimenez, whose body was found 14 months after he was captured during an ambush in Iraq; 114th Street and 37th Avenue, Corona.
1:30 p.m. Urban advocates release report showing that downtown Brooklyn rezoning is pushing out small businesses; in front of Albee Square Mall, DeKalb Avenue at Fulton Street, Brooklyn.
4 p.m. Economic Security Cabinet convenes final regional town hall meeting; York College-CUNY, Performing Arts Center, Small Theatre, 94-20 Guy Brewer Blvd., Jamaica.
6 p.m. China commentator and author Gordon Chang discusses the Beijing Olympics; Taipei Economic & Cultural Office, 1 East 42nd St.
6 p.m. Former West Virginia Governor Bob Wise discusses his book on high school education reform at a Democrats for Education Reform reception; Boucarou Lounge, 64 East 1st St.
6:30 p.m. The New York League of Conservation Voters and the Sierra Club host a film screening as part of their series, Wastelands: The Environmental Casualties of War; Cupcake Cafe, 545 9th Ave.
7 p.m. Council Member Kendall Stewart hosts Town Hall meeting; P.S. 269, 1957 Nostrand Ave.
7:30 p.m. Peter Frampton performs at Coney Island as part of Marty Markowitz’s “Seaside Summer Concert Series” at Asser Levy Park, West 5th Street and Surf Avenue.