Your birthday
A date is a starting point.
Find your birthday, then choose a year to see the Sun's position. Near a sign change, the time and place can decide which Sun sign belongs in your chart.
January
February
March
April
May
June
July
August
September
October
November
December
What changes with the year?
The Sun reaches each sign boundary at a different clock time each year. These pages compare calculated positions, including February 29 in leap years.
Your Moon sign, rising sign and houses need more information. The birth-chart calculator uses the date, time and place, with Placidus as the default house system.
Calculate your birth chart · Explore sign boundaries