In this article
What the calculator shows
After you enter a birth date, you see the zodiac sign of Black Moon Lilith at that moment, with an approximate degree. The sign links to a page that describes the placement. For the background on what the point is, see the Black Moon Lilith guide.
The point is the mean lunar apogee, the farthest part of the Moon's orbit from Earth. The calculation is astronomy, while the meaning attached to the sign is astrological tradition.
Why the date is almost always enough
Lilith moves about forty degrees a year, so it spends roughly nine months in each sign. For most birthdays the date alone settles the sign, with no need for a birth time or a place.
The exception is a birthday close to the day Lilith changes sign. The tool shows the degree, so you can see how near the edge you are, and a birth time would then matter.
What happens behind the form
The tool converts your date into a Julian date and counts the centuries from the standard astronomical reference moment. It then applies the usual formula for the mean longitude of the Moon's apogee, which grows steadily over time. The longitude is placed on the zodiac belt, and dividing it into twelve 30-degree sections gives the sign, with the remainder as the degree.
Because this is the mean position, it moves smoothly. True Lilith, which some chart programs show, jumps around that average by many degrees, so the sign can differ. If your chart does not match, check which version it uses.
What to read next
Open your sign's page for the untamed theme, its shadow and strengths, and habits to try. The apogee is also the idea behind the micromoon. To compare with another placement, try the Moon sign calculator or browse the zodiac signs hub.
Reflection rather than science
Astrology has no demonstrated scientific basis. The position of the apogee is an ordinary calculation, but what it says about you is a matter of symbolism and enjoyment. Many people share your result, so treat it as a starting point for thought and not a verdict. Nothing you type leaves your device.
Questions people ask
Do I need my birth time or place?
Usually not. Lilith changes sign about every nine months, so the date is enough unless your birthday is close to a change.
Why does my chart show a different sign?
Your chart may use true Lilith, which can differ from mean Lilith by many degrees.
Is this the asteroid Lilith?
No. This is the lunar apogee, a point in space, not the asteroid.
Is my data sent anywhere?
No. Everything is calculated in your browser, and nothing is stored or transmitted.