The Honk! festival of activist street bands returns to a full weekend schedule this year after a 2020 virtual version and one last year shrunken to a single day by Covid concerns.

Sure, our calendars are filled with increasingly commodified holidays, but they’re also filling up with new days of nationwide significance.

Though the Lunar New Year began Feb. 1, its celebration comes Sunday to Cambridge with a small Harvard Square street fair and a car parade from Boston that will stop at City Hall. Both are free, public events.

West Cambridge’s Mount Auburn Hospital has shared an image of the first baby born there in the new year.

PorchFest and the Ignite! Global Food and Fire Festival are Saturday in Somerville, stretching the day’s entertainment from noon to 10 p.m.

Caution over the coronavirus has shrunk the year’s Honk! festival of activist street bands again, this time by keeping all of the music confined to a single Saturday rather than a full weekend.

Cambridge Carnival, the annual celebration of Caribbean culture, returned Sunday with a smaller, in-person version of the festival after live events were canceled the previous two years.

After the Honk! festival of activist street bands went online-only during last year’s pandemic, this year’s celebration in October will look different yet again from what people have enjoyed since its launch in Somerville in 2006.

The Cambridge Historical Society is rebranding after 116 years as History Cambridge, with among its first public events under the new name coming June 8 and Aug. 10 to the Starlight Square outdoor entertainment complex: “Cambridge Love Letters.”

Earth Day is Thursday, but in Cambridge that matters less, as there are weeklong events reminding us of the need to take care of our planet, stretching from a Monday storytime to an April 25 socially distanced cleanup at Jerry’s Pond.