Goofs

Sylvia is shown to have advance seats to see a production at the Delacorte Theatre in Central Park. Advance seats to shows at the Delacorte are not generally available and can only be acquired by waiting in line at the theatre the morning of the show.

When starting the lawnmower, the lever is pulled all the way back, which is the 'stop' position. For starting, it has to be all the way forward. It would not have started as shown.

At dinner with Margaret's grandparents, her father asks her mother's parents if they watch Jeopardy. The film is set in 1970-71 but Jeopardy! (1984) didn't air until 1984.

While the current version of Jeopardy didn't start running until 1984, the original Jeopardy! (1964) hosted by Art Fleming started airing in 1964 and ran until 1975.

Margaret Simon has brown eyes. She can't be a naturally conceived daughter between Barbara and Herb as both parents have blue eyes.

That belief is a myth. While quite rare, it still is possible for two blue-eyed parents to have a brown-eyed child.

The red/orange bird shown in the film is an exotic species (northern red bishop or orange bishop) due to a U.S. law protecting domestic birds from commercial exploitation. For any scene, a film would normally have to acquire a trained rather than wild bird. The Audubon Magazine has said: The law "has saved millions, if not billions, of birds from depredatory human activities."

The northern red bishop has a wide distribution across Northern Africa, is widespread, and of least concern of endangerment.

In the synagogue, they are using the (Conservative) Rabbinical Assembly's Siddur Lev Shalem prayer book. It was published in 2016. The cantor is a woman, but females weren't ordained as cantors until 1975 for Reform and 1987 for Conservative.

This was set in 1970 and adhesive sanitary pads were not available until the 1980s.

The radio is playing the version of "The Night they Drove Old Dixie Down" by Joan Baez which was released in August 1971; the movie is set in 1970.

While there was a famous production of The Pirates of Penzance at the Delacorte, it was not until 1980. The 1970 productions there were Henry VI and Richard III, presented collectively as The Wars of the Roses.

The grand piano in Sylvia's (Kathy Bates) apartment is a Boston, but Bostons weren't produced until Steinway started that line in 1992 (designed by Steinway but manufactured by Kawai).