1. SPORTS & RECREATION: Track & field

The Lincoln-Sudbury track & field team hosts Dual County League foe Boston Latin. Competition begins at 10 a.m. at Lincoln-Sudbury Regional High School.

2. CLASSES & LECTURES: Woodcock walks

Enjoy a beautiful spring sunset while listening and watching for the incredible woodcock flight at Greenways Reservation from 6:30-8:30 p.m. Male woodcocks fly in an upward spiral and make a distinctive call to attract females. Don’t let this wonderful spring experience pass you by. Led by Weston Conservation Agent Michele Grzenda.

Registration required. SVT Members: Free, Non-Members: $10

For additional information and registration, visit www.svtweb.org or call 978-443-5588.

3. ART & ENTERTAINMENT: Film double feature

Friends of the Assabet River National Wildlife Refuge presents two fascinating documentary films and a green craft.

At 10:30 a.m., Friends will show Earth Days (2010). The film documents the growing awareness and understanding of the environmental crisis and emergence of a movement to confront it (running time: 120 minutes).

At 12:30 p.m., refuge staff will teach kids how to make the own reusable bag. Bring your own supplies — a needle, thread and pillowcase or old t-shirt.

At 1:30 p.m., Friends will show of Earth (2007). The film is a feature-length version of the documentary TV series Planet Earth (running time: 90 minutes).

4. SPORTS & RECREATION: Tennis

The Lincoln-Sudbury boys tennis team hosts Dual County League foe Weston. First serves are scheduled for 11 a.m. at Lincoln-Sudbury.

5. SPORTS & RECREATION: Softball

The Lincoln-Sudbury softball team hits the diamond for a home game against Weston. First pitch is slated for 11 a.m.