The annual Bloomsday celebration centers around James Joyce's work, particularly his novel "Ulysses." Participants engage in readings from the text and often dress in period costumes to accurately represent the era depicted in the book. The celebration includes various events such as theater performances, lectures, and cultural discussions that delve into the significance of Joyce's writing. Bloomsday not only commemorates a literary milestone but also fosters community engagement and appreciation for literature, allowing individuals to connect through a shared passion for Joyce's contributions to modernist writing.