Zach and Zoe’s birthday and the anniversary of Zach’s death

Zach and Zoe’s birthday and the anniversary of Zach’s death coincide on the twins’ twenty-first birthday, a date that binds the Marconi family’s celebration to the loss of Zach. At Tranquillum House, Zoe finally names the shared birthday aloud; rather than erase the grief attached to it, the moment lets her parents stand with her in acknowledging both the living and the dead.

A birthday altered by bereavement

Zoe describes Zach as her twin brother, and even saying his name makes it sound strange and painful to her. When Frances points out that the twins’ birthday is only a few days away, Zoe takes a sprig of lavender from a vase and shreds it. She says she no longer celebrates on the date and has, in effect, changed her birthday. The gesture and explanation show how Zach’s death has changed not only the family’s experience of the anniversary but Zoe’s sense of her own place in it: a day once shared with her brother has become difficult to claim for herself.

The date carries a specific history of avoidance. The Marconis came to Tranquillum House because they could not bear to be at home in January, when Zach had hanged himself. The family’s retreat therefore begins inside the calendar of his death: changing location offers relief from the familiar setting, but does not remove the anniversary or its hold on them.

Grief, guilt, and the returning date

The anniversary is also the day on which Heather tells Masha that it is the anniversary of her son’s death. She explains that she had been upset and not thinking straight, but now understands, presenting herself as grateful for the psychedelic therapy. Her words occur under pressure from Masha, who has challenged her earlier objections. The exchange makes the date more than background information: grief shapes Heather’s response to the retreat and becomes entangled with her effort to make sense of what has happened there.

Zoe’s grief has its own unresolved history. She says she had been angry with Zach and felt that his suicide had been done on purpose to make her feel bad forever. She could not forgive him, experiencing his death as the cruelest thing he had done to her. After the psychedelic session, however, she says it felt as if they had talked again. The anniversary thus gathers both the ache of the loss and the possibility of a changed relationship to memory; the story presents that possibility through Zoe’s account of an experience, not as proof that the dead have returned.

Naming the shared birthday

After the guests leave the retreat’s supervision and prepare dinner together, Zoe announces that it is her twenty-first birthday. The others turn to look at her. She then takes a shaky breath and adds that it is Zach’s birthday too: it is their birthday. Her parents move to stand on either side of her. Frances suggests having a little wine with dinner, making room for an ordinary act of celebration without diminishing the weight of the disclosure.

The scene reverses Zoe’s earlier decision to stop celebrating the date. She does not announce that her grief is finished or that the birthday has become easy; the shaky breath keeps the pain present. Instead, she claims the shared day in front of others, and her parents’ movement gives that claim a visible family response. The anniversary remains an occasion of mourning, but it can also again be named as the twins’ birthday.

The date as an ongoing bond

The birthday’s significance lies in its double meaning: it marks a life Zach and Zoe shared, and it returns the family to the death that transformed that life. Zoe’s act of naming both birthdays does not undo her anger or recover the celebration as it once was. It makes space for remembrance within the lives of those who remain. In that sense, the date becomes a small ritual of connection—one in which grief is neither hidden behind a changed birthday nor required to exclude the possibility of celebrating Zoe.