The straightforward answer
October 29 falls under the sign of Scorpio. The sun enters Scorpio around October 23 and leaves around November 21 each year. That makes your sign fixed water, ruled traditionally by Mars and modernly by Pluto. Simple enough on the surface, but the actual chart you were born with is rarely just a sun sign. If you are trying to determine what sign someone born on this date is, you do not just look at the calendar date. You need the exact time and place of birth to calculate the rising sign, the Moon sign, and where every other planet was placed. Without that information you are only getting a single data point. I deal with birth chart requests fairly often, and the most common problem I run into is people assuming the sun sign tells the whole story. It does not. A person born on October 29 at 3 AM in Chicago will have a very different chart than someone born on October 29 at 7 PM in Lisbon, even though both have Sun in Scorpio. The Ascendant alone can shift by a full sign in that amount of time.
To do this correctly you need a reliable ephemeris or a chart calculation tool. The method is basically taking the sidereal time at the moment of birth, applying the geographic coordinates, and computing the house cusps. Modern software like Solar Fire, Astrodienst, or even free calculators on the web handle the math, but you still need accurate birth time. The US Naval Observatory and other astronomical sources publish the data that these programs rely on. The tricky part comes with the cusp issue. Some years the sun enters Scorpio on October 22 instead of the usual October 23 due to leap year shifts and the exact timing of the tropical zodiac. In 2025 for example, the sun entered Scorpio on October 22 at 2:15 UTC. So if someone was born on October 22 in that year before that exact moment, they are technically a Libra, not a Scorpio. It happens every few years and causes more confusion than you would think. There is also the matter of sidereal versus tropical zodiac. Most Western astrology uses tropical, which is what I referenced above. Vedic astrology uses sidereal, which is offset by roughly 24 degrees. A person who is a Scorpio in tropical might show up as a Libra in sidereal calculations. You need to know which system your source is using before you trust the result.
When I am working with birth dates for clients or research, I usually pull the data from Astrodienst's extended chart selection. It gives you the precise planetary positions, house system, and aspects in one go. It takes about two minutes to get a full natal chart once you have the birth details entered correctly. Skipping that step and just looking at a sun sign calendar is where most people get it wrong. One thing worth noting about Scorpio sun signs born on this date specifically: because Scorpio is a fixed sign, the personality markers tend to be more pronounced and consistent than mutable or cardinal signs. But the ruling planet overlay matters a lot. Mars-ruled Scorpios, which applies to most of the 20th century, tend to express the sign differently than Pluto-dominant generations. People born between 1983 and 1995 for example had a heavier Pluto influence in their natal charts, which changes how the Scorpio traits manifest in practice. If you are building a database or doing research on birth dates, the practical workflow is: collect the date, time, and location. Run the calculation through a proper ephemeris-based program. Note the Tropical Zodiac position. Cross-reference with a sidereal chart if needed. Document the house system you used because Placidus, Koch, and Equal House all give different Ascendant values for the same birth time.
Get the Full Details
The main limitation here is obvious: without a recorded birth time, any chart interpretation beyond the sun sign is a guess. I have seen people claim certain Moon signs or rising signs for October 29 births online without any birth time data. That is not astrology, it is speculation. You can state the sun sign with confidence, and that is it unless you have more information. For anyone who just wants a quick answer, yes, October 29 is Scorpio in the tropical zodiac. If you want the full picture, you need the birth time, the birth location, and a tool that actually calculates from first principles rather than just telling you the sun sign from a lookup table.
