# December 18: what zodiac sign?

December 18: what zodiac sign?: astronomical data computed by Astraluno with explicit time zone and precision.

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If you were born on December 18, your Sun is in Sagittarius in the UTC days computed from 1950 to 2030.

Computed: Tue, Oct 13, 2026, 9:51 AM (UTC). Display zone: UTC.

Ranges computed over the whole local day in 1950–2030, not an exact natal position. Another time zone can move the crossing to an adjacent date. Chaldean decans: three 10° sectors, with traditional rulers cycling Mars, Sun, Venus, Mercury, Moon, Saturn, Jupiter.

With the Sun in Sagittarius, enthusiasm seeks a horizon wider than your current habits.

Adventure begins with a possibility. The Sun in Sagittarius gives identity momentum, optimism and candor: an unfamiliar language or a large question can renew your interest. Freedom matters greatly, alongside the risk of overlooking details or saying something without enough attention to its impact.

## Degrees, decans and elements

| Sign | Approximate Sun degree range | Decan and ruler | Element | Modality |
| --- | --- | --- | --- | --- |
| Sagittarius | 25°15′–27°37′ | 3: Saturn | Fire | Mutable |

## Dates of these signs in 2026

| Sign | Start | End exclusive |
| --- | --- | --- |
| Sagittarius | Sun, Nov 22, 2026, 7:23 AM (UTC; ±3 min) | Mon, Dec 21, 2026, 8:50 PM (UTC; ±3 min) |

Tropical zodiac, geocentric positions. Times estimated with engine 0.1.0, IANA 2026e zones. Windows are empirical estimates, not confidence intervals.

## Links

- [Calculate your sign with year, time and place](https://astraluno.com/zodiac-sign-calculator/)
- [Sagittarius](https://astraluno.com/signs/sagittarius/)
- [Sun in Sagittarius](https://astraluno.com/planets/sun/sagittarius/)
- [Previous day: December 17](https://astraluno.com/zodiac-signs/december-17/)
- [Next day: December 19](https://astraluno.com/zodiac-signs/december-19/)
- [All dates in December](https://astraluno.com/zodiac-signs/december/)

Canonical: https://astraluno.com/zodiac-signs/december-18/
Last revised: 2026-10-13