It’s the time of year when dressing up in your alter ego superman character is embraced, when candy corn makes an appearance and ghosts come out to play. And on the Vineyard, Halloween is a weeklong event, just as it should be.

Celebrations begin Friday night at Alex’s Place with a middle school dance from 7 to 10 p.m. Costume contests, prizes, black lights and a full light show are in order.

On Saturday, Oct. 26 from 11 a.m. to 2 p.m., Edgartown businesses say yes to trick-or-treating.

Vineyard Haven is turned into a ghost-town on Sunday from noon to 3 p.m. when the Martha’s Vineyard Museum hosts a Halloween festival at the old Marine Hospital on Lagoon Pond Road. The festival on the front lawn of the future site of the museum includes costume constants, historic games, carvings and food. The best carved pumpkins and Halloween costumes, both child and adult, will be judged by Island author Susan Klein, Featherstone Center for the Arts executive director Ann Smith and superintendent of Vineyard schools, Dr. James H. Weiss. The Vineyard Haven Library is also hosting a kids halloween party on Sunday afternoon.

Meanwhile at the Edgartown Library on Tuesday, Oct. 29 at 7 p.m., a free screening of Swedish vampire movie, Let the Right One In, follows the story of a bullied boy finding love and revenge in a vampire girl.

And on Halloween get out your goblins and glitter for the big day and night. There will be a parade starting at noon on Main street in Vineyard Haven and the trick-or-treating goes all afternoon long and then into the evening on William street, which is closed to cars from 6 to 9 p.m. to let the wee ghost and ghouls roam safely. Up-Island the Grange Hall hosts a party from 3:30 to 5 p.m. complete with hay rides into the nearby West Tisbury graveyard.

Back down-Island, a documentary based on Amittyville Horror plays at the Oak Bluffs Library at 6 p.m. and the Martha’s Vineyard Film Society is showing Frankenstein performed by the National Theatre of London at 7:30 p.m.

For late night revelers, costume contests and dance parties are going down at the Lampost with the disco cover band the Boogies and at Dreamland with DJ Pretty Ninja beginning at 9 p.m., where proceeds benefit the Chicken Alley Thrift Store.

But if you’re in for the night, there’s always the age old question to answer: Milky Way or Snickers?

For a full list of events, visit the Gazette calendar.