Your 'moon sign' is where the Moon was at the minute you were born, the inner one, as opposed to the sun sign you tell people at parties.

Because the Moon moves through a sign in roughly two and a half days, it needs a birth time to pin down, which is why moon signs feel more specific than sun signs. Traditionally it stands for private life, instincts and what you needed as a child. It's the placement people find most persuasive, and the one most sensitive to a mother's guess about the hour.