Sky&Numbers

Moon Sign Calculator

Type your birth date, and the time and place if you have them. The Moon moves fast.

Plate XIII · Moon sign

Type it or use the calendar: 1990-03-05, 3/5/1990 or March 5 1990.

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What your moon sign is

Your moon sign is the sign the Moon was passing through when you were born. Astrology reads the Moon as your inner weather: moods, needs, the comfort you reach for when tired or upset. The sun sign is how you shine; the Moon is how you feel and recover.

The Moon crosses one sign in about two and a half days, much faster than any planet. On most birth dates it stays in one sign all day, so the date alone is enough. On roughly two days in five it moves into the next sign at some hour, and then the time decides.

Without a time, we use noon and check the whole day. If the Moon changed sign, the result says so, for example Cancer or Leo with the hour it crossed, so you can decide with a rough idea of when you were born. Place matters only for the time zone.

What each moon sign means

Moon signNeeds to feel safeWhen upset
AriesAction and independenceFlares up, then moves on
TaurusRoutine, comfort, good foodDigs in and goes quiet
GeminiTalk and varietyThinks it through out loud
CancerHome and close familyWithdraws to a safe place
LeoWarmth and appreciationNeeds to be heard
VirgoOrder and being usefulFixes or worries
LibraPeace and companySeeks balance or a second opinion
ScorpioTrust and depthHolds feelings tight
SagittariusSpace and meaningLooks for the bright side, or leaves
CapricornControl and progressWorks harder
AquariusFreedom and friendsSteps back to think
PiscesGentleness and restEscapes into music, sleep or daydreams

Worked examples

  1. Born 1990-03-05 at 10:00 in New York: Cancer at 4 degrees.
  2. Born 1990-03-07, time unknown, New York: Moon in Cancer or Leo because it entered Leo at 07:24 local time that morning.
  3. Born 1999-08-11 at 11:03 in London, during the total solar eclipse: Leo
  4. Born 1983-05-25 at 21:15 in Los Angeles, at 27 degrees of Scorpio

How this is calculated

Apparent geocentric ecliptic longitude of the Moon (true ecliptic and equinox of date) from astronomy-engine at the UTC instant of birth. Without a time: noon local, and the local day from 00:00 to 24:00 is searched for a sign change, found to the minute.

Sources, pass mark and test result