Does your lover seem two-faced? Maybe he or she is a Gemini. Gemini reigns the Zodiac from May 21 till June 20. Whether or not you believe in it, astrology can be a helpful tool for reading and understanding people. Geminis seem to be an especially challenging breed, so to speak. In the words of Natalie Portman, “I’m a Gemini, so I change my mind every day.” To help you better understand and communicate with Geminis, here are 30 Gemini traits you need to know.