♎︎ Sun at ~25° Libra · third decan · Jupiter

October 18 zodiac sign: Libra, third decan

If you were born on October 18, your sign is Libra, the air sign ruled by Venus: the Sun is in Libra on this date in every year from 1980 to 2030. The Sun sits about 25° into Libra on this date, in the third decan, where Libra's core takes on a Jupiter flavour. Here's what the date fixes, and what only your birth time can tell you.

Your sign: Libra

The cardinal air sign that lives in relationship and refuses to choose between two goods.

A Libra Sun is built around fairness and the relational fabric. You're allergic to bullies and to anyone who treats other people as means rather than ends. You see all sides — the gift and the curse of your sign — and you're often the person who can name what each side actually wants when everyone else has lost the thread.

The date fixes the Sun; the hour fixes the rest. A Libra born October 18 in the early afternoon has Aquarius rising, and a different first impression from one born at dawn. Your rising sign needs the birth time; the twelve Libra Sun combinations show what each one changes.

Libra dates, traits & compatibility → · What a Libra birth chart looks like →

In the US (2000–2014), an average of 11,522 babies were born on each October 18, rank 133 of 366 dates; Libra is number 5 of 12 signs (8.52%). What's the most common zodiac sign?

The Moon on October 18, 1980–2030

Across the 51 years from 1980 to 2030, the Moon at noon UTC on October 18 was most often in Cancer and Sagittarius (6 years each) and least often in Aries and Virgo (3 years each). Unlike the Sun, the Moon sign depends on the birth year. On October 18, 2026, the Moon stays in Capricorn the whole UTC day.

In 26 of those 51 years (51%) the Moon changed sign during October 18 itself, so in those years the birth time decides the Moon as well as the rising sign. Cells with an arrow mark them, with the UTC time of the change. The Moon was exactly full on October 18 in 2013, and new in 1990, 2009, and 2028.

Find your birth year. One sign means the Moon spent the whole UTC day there; an arrow means it changed sign that day, at the UTC time shown: born before it, the first sign; after it, the second. The Moon sign calculator settles it in seconds; your birth chart adds the rising sign and houses.

Times in UTC: a birth late in the evening in the Americas, or early in the morning in Asia, can fall on the neighbouring UTC date.

October 2026: full moon October 26, 2026, Taurus · new moon October 10, 2026, Libra.

Your decan: the third decan of Libra

Each sign is divided into three 10° decans, and each decan has a sub-ruler that shades the sign's core. Degrees 20–30 of Libra belong to Jupiter: where you grow, where you find meaning, and where life tends to be generous to you. Read it as Libra with a Jupiter accent — the air core is unchanged, the emphasis moves.

Decan tarot card · Golden Dawn attribution

Four of Swords

Rest · Recovery · Contemplation. The card assigned to this ten-degree slice of the zodiac — a birthday card in the same sense a sun sign is a birthday sign: one lens on the date, not a verdict.

Read the Four of Swords in full on My Day Check →

All the tarot cards for October 18: decan, sign, ruling planet and year card →

What the date can't tell you

The Sun is one placement out of ten. Your Moon sign changes every two to three days, so Libras born on October 18 in different years have different Moons; your rising sign changes every two hours and needs a birth time and place. Those two carry most of what people mean by "personality" in a chart.

Born October 18? Add your year, time and place

Your Moon and rising depend on the year and hour. Computed here in a few seconds — then your full chart with a preview of its reading, no sign-up.

Or browse the twelve possibilities: Libra Sun with each Moon → · just my Moon sign · how the free birth chart calculator works

Classic matches for an October 18 birthday

By sun sign, Libra pairs most easily with Gemini, Aquarius, Leo, Sagittarius. Sun-sign compatibility is the coarse layer; the couple reading compares both full charts.

Common questions

What zodiac sign is October 18?

October 18 is Libra, the cardinal air sign ruled by Venus. The Sun sits at roughly 25° Libra on this date, in the third decan.

What decan is October 18?

The third decan of Libra (20°–30°), sub-ruled by Jupiter. Decans divide each sign into three 10° slices; the sub-ruler adds a second flavour to the sign's core — here where you grow, where you find meaning, and where life tends to be generous to you.

What tarot card is October 18?

In the Golden Dawn system each decan has a minor arcana card: for the third decan of Libra it is the Four of Swords (rest, recovery, contemplation). It's a birthday card in the same way a sun sign is — one lens, not a verdict.

What Moon sign is someone born on October 18?

It depends on the year, and in 51% of years on the hour too. For example: in 1980, Aquarius; in 1990, Libra; in 2000, Gemini or Cancer; in 2010, Aquarius or Pisces; in 2020, Scorpio. Over 1980–2030 the Moon on October 18 was most often in Cancer and Sagittarius. A birth time and place pin it down.

Does everyone born on October 18 have the same chart?

No. They share the Sun in Libra, but the Moon changes sign every two to three days, the rising sign every two hours, and the outer planets by year. Two people born October 18 in different years can have almost nothing else in common in their charts.