Vinyl Takeover @ Aeronaut Brewing Company, Somerville — Vinyl sellers taking over the taproom with local vendors like Common Groove Records and Lyric Vendors, beers and a DJ for the night | FREE • 6-10PM

MIT Concert Choir & Symphony Orchestra @ Kresge Auditorium, Cambridge — MIT's Concert Choir and Symphony perform a choral oratorio alongside a world premiere piano and orchestra piece from a Concerto competition-winning PhD student | $17 • 8-10PM

EDM + Hyperpop Party @ First Street Market, Cambridge — A hyperpop and girl EDM takeover with a stacked DJ lineup, custom speaker stacks and the signature iMac photobooth | $TBD • 9:30PM-1:30AM

Sweat & Social Fest @ Club Volo, Somerville — Fitness meetup meets block party with three back-to-back classes and an afterparty featuring a DJ, giveaways, open play bar games and bites from Sweetgreen. Bring water, sneakers and a yoga mat | FREE • 8:30AM-3PM

Trolley Tours: Revolutionary Line @ Somerville Museum, Somerville — Hop on a 90-minute trolley ride through Somerville's revolutionary sites with hyper-local stories and more stops at landmarks tied to the start of the war | $39 • 10AM, 12PM, 2PM, 4PM (same times available on Sunday)

Spring Clean Up @ Somerville Public Library East Branch, Somerville — A spring neighborhood cleanup hosted by East Somerville Main Streets with free coffee and pastries from Ola Cafe | FREE • 10AM-12PM

Earth Day Spring Mega Market @ Cambridge Crossing, Cambridge — Found Boston shuts down an entire street at Cambridge Crossing for their first outdoor market of the year with 100+ vendors selling vintage clothing, jewelry and handmade items. Live DJ and a beer garden on site | FREE • 12-5PM

Spring Fling: A Patio Season Party @ Aeronaut Brewing Company, Somerville — Aeronaut kicks off the outdoor patio party with live folk music from Hound & Handler, seasonal beers and picnic snacks from Pemberton Farms, florals and gingham encouraged | FREE • 2-7PM

Let's Get Social: Meet, Mingle & Eat @ Joe Sent Me, Cambridge — An open social for meeting new people across local Meetup groups with light apps on the house and an optional karaoke afterparty | $10 • 9-10:30PM

Running & Writing Workshop @ Constellation, Somerville — A writing workshop built around 20-30 minute neighborhood runs where the group stretches and discusses each participant's pre-submitted piece with local author David Tannenwald

Earth Day Free Clothing Swap Party @ Remnant Brewing, Somerville — Tag Collective hosts a free Earth Day themed clothing swap where you drop off gently worn pieces and pick up new ones. Meet strangers, say goodbye to old clothes and vibe out with live music all day | FREE • 11AM-5PM

1st Annual Pine-Car Derby Race @ Bow Market, Somerville — Bow Market launches its first-ever Pine-Car Derby where participants build a model car from scratch with pinewood, wheels, axles and a bit of creativity. Compete with up to 50 other cars and on a custom sloped track for the Somerville Classic Trophy | FREE • 11AM-6PM

Harvard Square Fashion Show @ Winthrop Street, Cambridge — Harvard Undergraduate Fashion Organization takes over Winthrop Street for an outdoor runway show featuring local retailers, a live DJ and free merch. Geared for college students but open to the public | FREE • 4PM

A Night for Joe @ Lou's Harvard Square, Cambridge — A music fundraiser bringing together a stacked lineup of Boston artists to support a member of the local music community, with a raffle featuring concert tickets, restaurant gift cards, Red Sox tickets and more | $30 • 6:30PM

The Latin Playlist Live Experience @ The Rockwell, Somerville — A night of live Latin music with five artists on the bill, each bringing their own sound across bossa nova, reggaeton, pop, ballads and rock | $10-25 • 7PM

Velvet Sundays Fantasy Neon Party @ Cocomango Speakeasy, Cambridge — A neon-themed dance party with reggaeton and Latin hits on a glowing LED dance floor, live performances and signature cocktails | $25 • 7PM