Join the Somerville Bicycle Committee and other cyclists on the second annual Illuminations Bicycle Tour to see the city's Christmas lights.
"This is a fairly slow ride that goes by some of the most well lit houses in the city," said organizer Brian Postlewaite in an e-mail.
"The tour is about an hour long with many stops to chat and see the lights."
Dress warmly, turn on your own lights and wear festive attire, if you like.
The tour will depart the high school at 6:20 p.m.
Afterward, there will be hot drinks at City Hall.