4 p.m.-6:30 p.m.: Lawrence Farmers Market, Vermont Street between 10th and 11th streets, 842-3883 or 838-4726.
5 p.m.-7 p.m.: "Homework Nights," free tutoring and homework assistance for 11- to 18-year-olds, Lawrence Public Library, 707 Vt., 843-3833, Ext. 121.
5:30 p.m.-9 p.m.: Osprey Group meeting with community stakeholders on South Lawrence Trafficway, Spring Hill Suites by Marriott, Lawrence Riverfront Plaza.
6:30 p.m.: Aviation Advisory Board meeting, Lawrence Memorial Airport, Pilots Lounge, 2500 Airport Road, 832-3400.
6:30 p.m.: Lawrence Board of Zoning Appeals, City Hall, Sixth and Massachusetts streets.
7 p.m.: SPUnK (Special Parents; Unique Kids) welcome-back planning meeting, Independence Inc., 2001 Haskell Ave., 832-8353. Child care provided.
9:30 a.m.-10:30 a.m.: Lawrence-Douglas County Health Department immunization clinic, Baldwin First United Methodist Church, 704 Eighth St. Fee charged.
7:30-11:30 a.m.: Lawrence Farmers Market, Vermont Street between 10th and 11th streets, 842-3883 or 838-4726.
9:45 a.m.-1 p.m.: Tenants to Homeowners homebuyers workshop, United Way Center, 2518 Ridge Court, 842-5494.
10 a.m.-noon: Lawrence Parks and Recreation canoeing and kayaking workshop for children ages 9-15, Prairie Park Nature Center, 832-7980. Registration required.
Noon-4 p.m.: Lawrence Humane Society adopt-a-pet, Petco, 3115 Iowa, 843-6835.
2 p.m.-3 p.m.: Lawrence Parks and Recreation workshop on becoming an ethical outdoors person for children ages 9-15, Prairie Park Nature Center, 2730 Harper St., 832-7980. Registration required.
7 p.m.-11 p.m.: Saturday Nite's Main Event youth lock-in for fourth- through eighth-graders, East Lawrence Center, 1245 E. 15th St., 832-7950.
10 a.m.: Lawrence Parks and Recreation Mass Street Mile Run, ages 8-70, 832-7940. Fee charged.
10 a.m.-5 p.m.: Lawrence Parks and Recreation Fall Arts and Crafts Festival, South Park, 1131 Mass., 832-7940.
2 p.m.-4 p.m.: Young Adult Advisory Board meeting, Lawrence Public Library, 707 Vt., 843-3833, Ext. 121.
4 p.m.-7 p.m.: Riverfest, music, speakers, exhibits, free, Burcham Park, Second and Indiana streets.
9 a.m.: Douglas County Commission meeting, county courthouse, 1100 Mass.
10:30 a.m.: Jefferson County Youth Against Drugs and Alcohol (YADA) speaker Don Young, Perry-Lecompton Middle School, 203 W. Bridge St., Perry, (785) 863-2447.
1:30 p.m.: YADA speaker Don Young, Perry-Lecompton High School, 404 Lecompton Rd., Perry, (785) 863-2447.
6:30 p.m.: North Lawrence Improvement Assn. potluck picnic, John Taylor Shelter House, Walnut and Seventh streets, 842-7232. Bring a dish to share; drinks and dinnerware provided.
6:30 p.m.: Pre-application meeting for registration and licensing of family day care homes, Lawrence-Douglas County Health Department, 200 Maine, 843-3060.
7 p.m.: Lawrence school board, school district headquarters, 110 McDonald Drive.
7 p.m.-9 p.m.: Countdown to Common Ground community meeting on social capital, Lawrence Visitor Information Center, 402 N. Second St.
7 p.m.-9 p.m.: East Lawrence Neighborhood Assn. general meeting, New York School, 936 N.Y., 832-0232. Dennis Enslinger will discuss House Bill 2128, historic preservation tax credits and rebates, and grant opportunities for home and business owners.
7:30 p.m.: Traffic Safety Commission meeting, City Hall, Sixth and Massachusetts streets.