Today's calendar:

The Seattle City Council's Committee on the built environment will discuss zoning changes and affordable-housing incentives in South Downtown.

Today, 5:30 pm, City Council Chambers, City Hall, 600 Fourth Ave.

The three finalists for Seattle Police Chief will take questions and participate in a public forum at Seattle Center.

Tonight, 6:00 pm, Seattle Center's Rainier Room, 305 Harrison St.

The city's Bicycle Advisory Board meets to discuss the Bicycle Master Plan tonight.

Tonight, 6:00 pm, City Hall, 600 Fourth Ave., Room L280.

NARAL Pro-Choice Washington and allies in the pro-choice movement will hold a vigil to honor Dr. George Tiller, who was assassinated one year ago.

Tonight, 8:00 pm to 9:00 pm, Cal Anderson Park on Capitol Hill.

Historians and developers will discuss the history and future of Seattle’s streetcar network at a forum in the Central District.

Tonight, 7:30 pm to 10:00 pm, Central Area Center for Seniors and the Community, 500 30th Ave. S.

Tomorrow's calendar:

City Council member Sally Bagshaw and a representative from the city's Department of Planning and Development will discuss a controversial upzone around the Beacon Hill light rail station and other issues at the meeting of the North Beacon Hill Community Council.

Tomorrow, 6:30 pm, Beacon Hill Librar, 2821 Beacon Avenue South.