Find your rising sign
Your rising sign, or ascendant, is the sign that was rising on the eastern horizon at the exact moment you were born. To find it we need your birth time and place.
How we calculate it
The rising sign changes about every two hours, so your birth time matters: 15 minutes can change the degree and, near a boundary, the sign.
We convert your local time to universal time using your city's time zone history, daylight saving time included. From that we compute local sidereal time and the point of the ecliptic crossing the eastern horizon.
If you don't know your exact time, check your birth certificate. Without a time you can still find your sun sign and moon sign.