In light of the afternoon's accusations and confessions, what event had Nick forgotten and what might it symbolize in the context of the novel? The Great Gastpy

Tom and Daisy's anniversary, symbolizing the decline of their marriage
The 4th of July, symbolizing the birth of the American Dream
His mother's birthday, symbolizing the lack of nurturing in the novel
His 30th birthday, predicting a transition from the carefree 20s to a more complex 30s

The 4th of July, symbolizing the birth of the American Dream. This event is significant in the novel as it represents the ideal of the American Dream that many of the characters strive towards but ultimately fail to achieve. It also highlights the superficiality and emptiness of the wealthy characters in the novel, who use their wealth to throw extravagant parties and indulge in excess, rather than focusing on more meaningful pursuits. Additionally, the fact that Nick forgets this event could symbolize his own disillusionment with the idea of the American Dream and the shallowness of the society he is surrounded by.