How to Find Your Birth Time (And What to Do If You Can't)
Your birth time is usually found on your birth certificate, hospital records or a baby book, and you can often get it by asking the person who was there. It matters because it determines your rising sign and houses, so it is the single detail that most improves the accuracy of a birth chart.
Why the birth time matters
A birth chart needs date, time and place. The date alone gives you the Sun, Mercury, Venus, Mars and the outer planets in their signs. The time adds:
- The rising sign, which changes roughly every two hours
- The houses, which depend on the rising sign
- A precise Moon position, important on days the Moon changes sign
For more on those placements, see Sun, Moon and Rising and How to Read Your Birth Chart.
Where to look
Start with the sources closest to hand.
- Your birth certificate. Many US birth certificates record the time, particularly the long-form (full) version. Short-form or "abstract" versions often leave it out.
- Hospital records. The hospital where you were born may keep records of the delivery time. Contact its medical records department; you will probably need to prove your identity.
- Parents or relatives. Ask the person who was there. Memory can be imprecise, so ask whether they recall a clock, a note or a story about it ("just after lunch", "in the middle of the night").
- Baby book or keepsakes. Hospital bracelets, birth announcements, a baby journal or a family bible sometimes include the time.
- State vital records. If you do not have a copy of your birth certificate, you can request one from the vital records office of the state you were born in. Whether the time is included depends on the state and the document type, so ask which version includes it.
Check how reliable the time is
A time can be recorded to the minute or remembered roughly. If someone says "around 3," treat the rising sign as uncertain. Astrologers sometimes rate time reliability, where a time taken from an official record is considered the most trustworthy and a remembered time the least.
If you cannot find it
Some people cannot get their birth time (adoption, records lost, no one remembers). You have options.
- Use what does not need it. Your Sun, Mercury, Venus, Mars and outer planets are accurate with the date alone. Your Moon sign is accurate on most days; it only becomes uncertain on the day the Moon changes sign.
- Skip the rising sign and houses until you have a reliable time, and treat any chart that shows them as a guess.
- Try rectification. Some astrologers estimate a birth time by matching major life events to the chart. It is an interpretive method and it is not exact, so treat the result as an estimate.
- Use a "noon chart" with caution. Many calculators default to 12:00 when no time is given. That gives a reasonable Sun and Moon in most cases, but the rising sign and houses it shows are not meaningful.
Does an unknown birth time ruin compatibility readings?
No. You can compare planets and aspects between two charts without birth times, and those are the core of synastry. What you lose is house overlays and any contact involving the rising sign. If you are missing one person's time, mention that when you interpret the result.
A note on precision
Birth times on official records are often rounded to the nearest five or ten minutes, and some hospitals record the time of the first cry while others record the time of delivery. Astrologers accept that small differences exist. For most readings, a few minutes will not change the sign of the rising or Moon, but near a sign boundary it could.
Frequently asked questions
Can I find my birth time online?
Not unless it is in a public record, which most are not. Official records are held by the state or the hospital, and you will need to request them.
Does my birth certificate always have my birth time?
No. It varies by state and by the version of the certificate. The long-form version is more likely to include it.
What if my parents disagree about the birth time?
Use the time from the official record if you can get it. If not, note the uncertainty and avoid reading the rising sign and houses with confidence.
Is my Sun sign affected by birth time?
Only if you were born on the day the Sun changed signs, which is called being "on the cusp." In that case the time and place determine which sign you are.
Orbit provides astrology for entertainment and self-reflection. Readings are not predictions and are not medical, psychological, legal or financial advice.