Zooey Deschanel’s character, Summer Finn, is the archetypal "Manic Pixie Dream Girl." Vietnamese netizens love dissecting her personality through astrology. Summer is often labeled as a "Gemini" or "Aquarius" in Vietsub comments. This intersection of Western indie film and Vietnamese astrology obsession keeps the film trending.
The film ends with Tom meeting Autumn. The line, "Tom, it’s a Thursday... no it’s not. It’s Autumn." This pun is impossible to translate directly. The "top" Vietsub versions use a creative Vietnamese equivalent (e.g., "Mùa Thu" vs. "Mùa Hè") to preserve the hopeful irony. 500 days of summer vietsub phimmoi top