A birth chart without a birth time

Yes, you can have a birth chart without a birth time. Your date of birth is enough to place the Sun and the planets in their signs and to calculate the angles between them. What is missing without a time are the Rising sign, the houses and the Midheaven, and on some birthdays the Moon sign stays open between two signs.

What a birth chart shows without a birth time

Most of a chart moves so slowly that the hour of birth makes no difference.

• Your Sun sign. The Sun moves about one degree a day and changes sign about every 30 days. Only if you were born on the day of a change does the time decide.
• Mercury, Venus and Mars. Their signs describe how you think and talk, how you love, and how you go after what you want. The date fixes them, except on the few days when one of them changes sign.
• Jupiter, Saturn, Uranus, Neptune and Pluto. Jupiter stays in a sign for about a year, Saturn for about two and a half years, the outer three for much longer. Apart from the rare day of a change, their signs are certain.
• The aspects between the planets. Aspects are the angles between two planets, such as 90 or 120 degrees. The planets barely move within one day, so these angles hold whatever the hour was.

That is far more than a Sun sign: it is the larger part of a chart.

What is missing, and why

Three things depend not on the slow planets but on the daily turn of the Earth, and that is fast.

• The Rising sign, also called the Ascendant: the sign coming up over the eastern horizon at the minute of your birth. It changes about every two hours.
• The houses: twelve sections of the chart that begin at the Rising point and stand for areas of life such as home, work and partnership. Without them a chart can say that your Venus is in Taurus, but not which area of life it belongs to.
• The Midheaven: the highest point of the chart, read for career and public role.

Within 24 hours all twelve signs rise once, so the date alone cannot narrow it down. More in our guide to what the Rising sign is and why it moves so fast.

One practical warning: some chart calculators quietly fill in noon when you leave the time empty. The wheel then shows a Rising sign and houses that describe noon on your birthday, not you. Ignore them.

The special case: your Moon sign

The Moon is the one body in the chart that is fast enough for the hour to matter. It moves about 13 degrees a day. A sign is 30 degrees wide, so the Moon changes sign about every two and a half days.

So on about one day in two and a half, the Moon changes sign at some point during the day. If you were born on such a day, both signs are possible without a birth time. On all other days your Moon sign is certain.

If yours is one of the open cases, two things help:

• A rough time is often enough. If the Moon changed sign in the early morning and you know you were born in the evening, the question is settled.
• Read both descriptions. The Moon sign describes what you feel and what you need to feel at home. Most people recognize themselves clearly in one of the two. Here is what your Moon sign means.

Because the Moon's exact degree is unknown without a time, its aspects to the planets are less reliable than the rest.

Without a birth time you lose the frame of the chart, not the picture.

With and without a birth time: what you get

An AstroScroll reading follows the same logic. Without a birth time it still works: it leaves out the Rising sign and the houses and reads everything else. More on the page for the Birth Chart Reading.

How to find your birth time

For people born in the United States, these are the usual places to look:

1. The long-form birth certificate. The long form is the full copy of the original record and often lists the time of birth. The short version usually does not.
2. The vital records office. If you only have the short version, ask the vital records office of the state where you were born for the long form. Older records do not always contain a time.
3. The hospital. The hospital where you were born may still hold the birth record, though old files are not always kept.
4. Family papers. A baby book, a birth announcement or a hospital bracelet may note the time.
5. Parents and relatives. Ask the people who were there, but keep in mind that remembered times are often rounded to the hour.

If you were born in another country, the civil registry of your birthplace is the first place to ask.

How exact does it have to be?

The Rising point moves about one degree every four minutes. A birth time that is a few minutes off rarely changes your Rising sign, unless the sign was just about to change. An hour off can change it and shift planets into other houses. When a document and a memory disagree, use the document.

If no record exists

Astrologers have a technique called rectification. It works backward from dated events in a person's life to estimate a birth time. The result is an estimate, not a record, and two astrologers can arrive at different times. Treat a rectified time as a working assumption.

What to do next with your chart

Start with what is certain. Your Sun sign, your planets in their signs and the aspects between them already describe a great deal: how you think, love and act. If you are new to this, begin with what a birth chart is and how its parts fit together.

In the meantime, request the record. If the time turns up, the Rising sign and the houses are added to your chart, and nothing you have read before becomes wrong.