Saturday

8:30 a.m. to 4:30 p.m. The Municipal Art Society’s annual Livable Neighborhoods Program seminar on community planning; Hunter College, 695 Park Ave., 6th floor.

10 a.m. Caroline Kennedy helps kick off annual Madison Avenue Gallery Walk; Neuhoff Gallery, Fuller Building, 41 East 57th St., 4th floor.

11 a.m. Elected officials announce legislation to reform M.T.A.’s disability service; City Hall Steps.

11 a.m. Tony Avella calls for community facilities reform outside construction of a St. John’s University dormitory; in front of 172-10 Henley Road, between Kendrick Place and Mayfield Road, Queens.

11:30 a.m. to 4 p.m. Center for the Urban Environment celebrates grand opening of its new green building; 168 7th St., Brooklyn.

Noon. Obama campaign supporters kick off registration drive; Mother AME Zion Church, 140 West 137th St.

1 p.m. U.F.T. presents award to Bill Thompson at its annual Spring Education Conference; New York Hilton, 1335 Sixth Ave.

Sunday

3 p.m. Kevin Powell officially announces his bid for Congress; Five Spot Soul Food ; 459 Myrtle Avenue in Fort Greene.

Monday

6 p.m. Fund-raising dinner for Carolyn Maloney; The Princeton Club, 15 W. 43rd St.

Follow Katharine Jose via RSS.