My constellation is Cancer, and the lunar calendar is Gemini. What constellation am I?

You are a cancer, and the constellation looks at the solar calendar. The reason why you are like both Cancer and Gemini is because Gemini and Cancer are adjacent, and it is also possible that your rising sign is Gemini, because the rising sign also obviously affects the sun sign.

More specifically, you need to provide the date of birth, gender and place of birth to the minute.