 CONT: As the movie opens, its obviously Monday as Helen took the  vodka on Friday for her weekend birthday party. When she gets back  to her flat, she says Wednesday, shag day! Also, James identifies  Helen as Gemini so, if she just had a birthday, that would make it  June. In the screenplay she is Aquarius, which is more fitting  with the springtime feel of the movie and the clothes in external  shots (and the time of year the movie was shot). Gemini, of  course, fits the twin story lines of the movie.