Old Whalers’ 250th

The Old Whalers Church in Sag Harbor will commemorate the 250th anniversary of its founding this weekend with a free movie on the lawn Friday night, a cocktail party fund-raiser on Saturday evening, and a concert on Sunday afternoon.

“Finding Nemo,” the Academy Award-winning animated film from Pixar Studios about an overprotective clownfish’s search for his son, will be shown at dusk Friday. Refreshments will be available for purchase, and viewers have been advised to bring chairs or blankets to be comfortable on the grass.

The cocktail party will take place from 6 to 8 p.m. on Saturday in the church social hall. Tickets, priced at $50 for two people, will include two drink tickets, food, and entrance in a raffle with prizes of $1,000, $500, and $250. Only 250 tickets will be sold. Tickets can be purchased in advance by calling 631-725-0894 or, if any remain, at the door.

On Sunday, a 10 a.m. worship service featuring the choir will be held in the church sanctuary, followed by fellowship coffee time at 11. A free organ concert, which will happen at 3 p.m., will feature Prince Namatai Nayatanga from Zimbabwe, an organ scholar and conductor of the Boys Choir at the Church of the Heavenly Rest in Manhattan and former head of the Boys Choir at Canterbury and Winchester Cathedrals in England.

Built in 1845, the organ at Old Whalers is the oldest in a church on Long Island. The freestanding case, which contains gilded wooden “dummy” pipes, is a miniature of the church facade.