Cardinal signs are one of the three modalities in astrology, along with fixed and mutable signs. There are four cardinal signs: Aries, Cancer, Libra, and Capricorn. These signs correspond with the changing seasons, with Aries starting spring, Cancer starting summer, Libra starting fall, and Capricorn starting winter. Cardinal signs are known for their ability to initiate and take action, lead, and directly tackle obstacles. They are the energetic and enthusiastic starters of the zodiac. Cardinal signs are less commonly known as initiator signs. If you have a lot of planets in cardinal signs in your birth chart, it means you have a lot of energy for starting new things and taking action.