Zodiac sign calculator by birthday

How does this birthday calculator work?

Enter a valid date of birth between 1900 and today. The calculator matches the month and day to the chart above; the year helps validate your birthday, including leap years.

You do not need a birth time for this date-range lookup. It does not calculate the Sun’s exact position, a Moon sign, a rising sign or a full birth chart.

Why might two calculators show different signs?

The Sun changes signs at a particular moment, which can fall on a different date from year to year. A fixed birthday chart is a guide, so a birthday close to a sign change may need your birth year, time and time zone to resolve.

This tool does not resolve those boundary cases. For the distinction between date lists and precise calculations, see Astrodienst’s explanation of Sun sign dates.

What zodiac sign is February 29?

February 29 falls within Pisces in this date-range chart. Enter your actual leap-year birthday; there is no need to substitute February 28 or March 1.

How is Western zodiac different from Chinese zodiac?

Western Sun sign date ranges follow a cycle within the year. The popular Chinese animal zodiac follows a twelve-year cycle, with the animal year changing at Lunar New Year rather than January 1.

Knowing one sign does not determine the other. Our Chinese tool gives a birth-year estimate and explains why January and February birthdays need a calendar check.