• This year’s Marin Greek Festival is from 11 a.m. to 9 p.m. today and 11 a.m. to 8 p.m. Sunday at the Nativity of Christ Greek Orthodox Church at 1110 Highland Drive in Novato. Admission is $4 to $5 at the door. Go to nativityofchrist.org/marin-greek-festival.

• The 2025 Kiddo! Family Carnival is from noon to 10 p.m. this weekend and noon to 5 p.m. Monday at the Mill Valley Middle School at 425 Sycamore Ave. in Mill Valley. Wristbands are $45 at the door. Kiddo! also hosts a free Day on the Green with live music by the Illeagles, Marble Party and Joe Endoso from noon to 5 p.m. Monday at Friends Field at 180 Camino Alto in Mill Valley. Go to kiddo.org.

• The Mill Valley Historical Society presents its annual Walk into History on Sunday starting at the Mill Valley Chamber of Commerce and Visitors Center at 85 Throckmorton Ave. in Mill Valley. This year’s walking tours will focus on Mill Valley’s incorporation. Tours start every 30 minutes between 9 a.m. to 2 p.m.; special tours for kids and their families are at 9:45 a.m. and 12:45 p.m. Admission is $26.50; youth 18 and younger get in for free. Go to mvhistory.org/annual-walk-into-history.

• The Novato Historical Guild presents tours of the historic Pioneer Park Cemetery with docent Sharon Azevedo at 9 a.m. July 26, Aug. 16 and Sept. 20 at 1007 Simmons Lane in Novato. Admission is free with RSVP; suggested $10 donation at the event. Go to novatohistory.org/calendar.