If you were born in the US to Indian parents, your moon sign is not inherited from your parents’ birthplace or ancestry, it is computed from your own birth date, time and place.

Your birthplace, not your ancestry, sets the chart

The Moon’s position in the sky at your exact moment and place of birth determines your chandra rashi (moon sign). A birth in Houston is computed for Houston’s coordinates and time zone, the same precise way a birth in Hyderabad would be computed for Hyderabad, using the same astronomical rules.

Why the calculation still needs care

The one thing that matters is getting the birth details exactly right: correct local time zone (including whether daylight saving time was in effect), correct city coordinates, and an accurate birth time from the hospital record. These are data-entry details, not cultural ones.

Vedic vs Western sun signs

If you grew up seeing a different “sign” in Western horoscopes, that is likely your sun sign in the tropical zodiac, a separate system from the sidereal Vedic moon sign. Both can be computed for the same birth without conflict, they simply measure different things.

Why siblings born years apart can land in different rashis

Parents who had one child in India and a younger one after moving to the US sometimes expect the kids to share a sign, the way they might expect a shared surname or gotra. They don’t, and there’s no reason they should. The Moon moves through the zodiac roughly one sign every 2.25 days, so which sign it occupies for any given birth is essentially independent of what sign it was in for an older sibling. Twins born on the same day can even land in different signs if the Moon happens to cross from one sign into the next between the two births.

The most common data-entry mistake for US-born charts

The single most common error isn’t the state or the country, it’s daylight saving time. A baby born in Newark on a June afternoon needs the chart calculated in EDT (UTC-4), not EST (UTC-5). Mixing that up shifts the birth moment by a full hour, which usually isn’t enough to change the rashi but is exactly the kind of error that can change the lagna and shift the nakshatra pada.

Hospital paperwork adds a second trap: some records show 24-hour time, others show 12-hour AM/PM. Misreading a “12:30” as noon instead of midnight, or the reverse, is the second most common mistake in charts built from scanned birth certificates. If a chart looks off compared to what a family astrologer expects, this is the first thing worth double-checking before assuming the calculation itself is wrong.

If the original birth certificate is long gone

Plenty of second-generation adults have never seen their own birth certificate, it lived in a parent’s filing cabinet decades ago and nobody knows where it ended up. US hospitals and state Vital Records offices keep these on file essentially indefinitely, and a certified copy can usually be requested online or by mail for a small fee, typically in the fifteen to thirty dollar range depending on the state. It’s worth doing this once and saving a digital copy, since the exact time on that document is the one piece of data every future chart, dasha calculation or matching report will need.

Get your moon sign

Use the kundli tool with your exact birth date, time and city to see your accurate moon sign, sun sign and lagna together.