Get your mid-century nostalgia on at Newburyport’s Cruisin’ the 50s event Thursday from 5 to 8 p.m. Gawk at more than 100 classic cars — Cadillacs, Thunderbirds, Impala convertibles, and more — parked along the town’s main streets, and be serenaded by roaming doo-wop singers. newburyportchamber.org
Bollywood-style dances, a Sufi qawwali choral performance, classical and traditional Indian folk dances, plus a number from the movie Slumdog Millionaire are highlights of India Day at the Hatch Shell from 3:30 to 8 p.m. Sunday. Vendors will sell Indian food and crafts; admission is free.iagb.org
Tiny ultra-lightweight vehicles that can travel 100 miles on a gallon of gas will roll into City Hall Plaza on Thursday afternoon to kick off Boston GreenFest. A green film festival, eco gallery, fashion, exhibits, kids’ activities, music, and dance are part of the lineup. 617-477-4840; bostongreenfest.org
ALL THE RIGHT MOVES
Twenty contemporary dance companies from around the United States will take the stage at Boston’s John Hancock Hall for Urbanity Dance’s first Boston Contemporary Dance Festival. Buy tickets (starting at $20) for the 2 or 7:30 p.m. performances at bostoncontemporarydance.org. 617-572-3727
MISSION TO MARS
As NASA’s Mini Cooper-size Curiosity rover makes its first foray to the red planet, the Museum of Science celebrates here on Earth with a Mars and Beyond weekend. Visitors can hear talks by NASA spacesuit experts and other scientists, sit in on a live video chat about Curiosity with NASA’s Jet Propulsion Laboratory, and more. 617-723-2500; mos.org
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