Zodiac sign dates: birthdays and cusps
By Kosmo
Zodiac sign dates connect the twelve signs with the calendar. They are a familiar way to find your Sun sign and compare birthdays with friends. Most popular lists use the tropical zodiac, beginning with Aries around the March equinox. The dates are approximate because the Sun moves into each sign at a specific moment. Birthdays near those moments have their own interesting questions to explore.
Follow the zodiac year
The sequence is Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. Each sign occupies thirty degrees of the zodiac. The calendar follows this sequence across the year, with each sign associated with a stretch of roughly a month. Thinking of the signs in order helps you remember neighboring signs and find your way around a chart. It also explains why March brings the end of Pisces and the beginning of Aries.
Understand transition birthdays
The exact moment of a sign change varies by year and appears at different local times around the world. Two people sharing a month and day may therefore have different Sun signs if they were born near a transition in different years. To explore that edge, use the full date, recorded local time and birthplace. These details identify the moment to check in a chart and help you move from a general date range to a specific solar position.
What a cusp means
In everyday conversation, a cusp birthday means being born close to a sign change. You might enjoy exploring the themes of both neighboring signs, especially if other chart placements bring them into your picture. In a calculated chart, the Sun occupies one sector under the chosen zodiac system. Astrologers also use cusp for the beginning of a house, so the same word can refer to two different kinds of boundary.
Explore your birthday story
Think about which themes you recognize and ask someone with a nearby birthday how their experience compares. A chart gives you more references to explore beyond the Sun, including the Moon and rising sign. The astrology by date guide explains how the birth details fit together; the zodiac sign guide introduces the twelve portraits. Once you know your signs, Kosmo’s compatibility checker offers a new way to turn birthday curiosity into a conversation.