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Calculated planetary weather · noon UTC

The month has a shape. See it before it arrives.

A living map of exact-aspect samples, Moon changes, sign ingresses, and retrograde stations—calculated from the sky, then translated into plain English.

The period in one answer

From December 1 through December 31, 2025, the Moon moves from Aries to Taurus. The highest-priority calendar marker is Neptune stations direct on December 10. Each day is computed at noon UTC from geocentric tropical longitudes, and the notes beside them describe the symbolic theme of that geometry.

Moon in Aries 83% lit 3 retrograde
Transit intensity Relative signal, not a good/bad score

kept in this browser.

The sky, day by day

A month you can scan in one glance.

Intensity shows how concentrated the measured sky is—not whether a day is lucky or difficult. Open a date for every planetary degree behind the summary.

100 · Peak

Virgo Moon

Moon square Mars

Closest daily sample · 0°01' orb

☽ □ ♂ ☽ △ ♅
Peak Active Steady Quiet

Intensity combines closeness, the number of active aspects, and major calendar markers. It never means “good” or “bad.”

Dates worth circling

The turning points, with the math attached.

These cards are ordered by measured weight, not dramatic wording. Each one states the date, geometry, orb or detection rule, and what the symbol can—and cannot—tell you.

Dec 10 Wed

01 · Direction change · detected from longitude

Neptune stations direct

A station marks the change in apparent direction seen from Earth. The planet does not reverse in space; the apparent reversal comes from relative orbital motion.

Verifiable lineNeptune changes to apparent direct motion in the daily samples on December 10, 2025.

96 signal
Dec 5 Fri

02 · 100% illuminated · noon UTC

Full Moon in Gemini

The Moon reaches the brightest daily sample of the lunation, opposite the Sun in ecliptic longitude.

Verifiable lineThe Full Moon falls in Gemini on December 5, 2025, with 100 percent illumination at the noon UTC sample.

92 signal
Dec 20 Sat

03 · 0% illuminated · noon UTC

New Moon in Capricorn

The Moon reaches the darkest daily sample of the lunation, aligned with the Sun in ecliptic longitude.

Verifiable lineThe New Moon falls in Capricorn on December 20, 2025, with 0 percent illumination at the noon UTC sample.

92 signal
Dec 22 Mon

04 · Sign ingress · noon UTC sample

Sun enters Capricorn

Sun has crossed a thirty-degree zodiac boundary, beginning a new sign chapter in the public sky.

Verifiable lineBy the noon UTC sample on December 22, 2025, Sun is in Capricorn; the sign boundary was crossed after the preceding day’s noon sample.

88 signal
Dec 12 Fri

05 · Closest daily sample · 0°01' orb

Moon square Mars

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 12, 2025, Moon square Mars measures 0°01' from exact in geocentric tropical longitude.

84 signal
Dec 14 Sun

06 · Closest daily sample · 0°02' orb

Mars square Neptune

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 14, 2025, Mars square Neptune measures 0°02' from exact in geocentric tropical longitude.

84 signal
Dec 9 Tue

07 · Closest daily sample · 0°17' orb

Mars square Saturn

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 9, 2025, Mars square Saturn measures 0°17' from exact in geocentric tropical longitude.

82 signal
Dec 17 Wed

08 · Closest daily sample · 0°14' orb

Sun square Saturn

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 17, 2025, Sun square Saturn measures 0°14' from exact in geocentric tropical longitude.

82 signal
Dec 21 Sun

09 · Closest daily sample · 0°17' orb

Venus square Saturn

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 21, 2025, Venus square Saturn measures 0°17' from exact in geocentric tropical longitude.

82 signal
Dec 30 Tue

10 · Closest daily sample · 0°14' orb

Mercury square Saturn

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 30, 2025, Mercury square Saturn measures 0°14' from exact in geocentric tropical longitude.

82 signal
Dec 10 Wed

11 · Closest daily sample · 0°24' orb

Mercury opposition Uranus

Two planetary functions face one another across the chart, making contrast and competing priorities easier to see.

Verifiable lineAt noon UTC on December 10, 2025, Mercury opposition Uranus measures 0°24' from exact in geocentric tropical longitude.

81 signal
Dec 20 Sat

12 · Closest daily sample · 0°20' orb

Moon conjunction Mars

The two planetary functions occupy nearly the same degree, concentrating their themes rather than balancing them.

Verifiable lineAt noon UTC on December 20, 2025, Moon conjunction Mars measures 0°20' from exact in geocentric tropical longitude.

81 signal
Dec 24 Wed

13 · Closest daily sample · 0°22' orb

Venus square Neptune

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 24, 2025, Venus square Neptune measures 0°22' from exact in geocentric tropical longitude.

81 signal
Dec 21 Sun

14 · Closest daily sample · 0°28' orb

Sun square Neptune

The ninety-degree geometry emphasizes friction, adjustment and the need to direct effort deliberately.

Verifiable lineAt noon UTC on December 21, 2025, Sun square Neptune measures 0°28' from exact in geocentric tropical longitude.

80 signal
Dec 17 Wed

15 · Closest daily sample · 0°42' orb

Moon opposition Uranus

Two planetary functions face one another across the chart, making contrast and competing priorities easier to see.

Verifiable lineAt noon UTC on December 17, 2025, Moon opposition Uranus measures 0°42' from exact in geocentric tropical longitude.

78 signal
Dec 18 Thu

16 · Closest daily sample · 0°52' orb

Moon conjunction Mercury

The two planetary functions occupy nearly the same degree, concentrating their themes rather than balancing them.

Verifiable lineAt noon UTC on December 18, 2025, Moon conjunction Mercury measures 0°52' from exact in geocentric tropical longitude.

77 signal

The three strongest days

Plan attention, not fear.

A high signal means more geometry is concentrated around one date. It can be easy or demanding. The useful response is extra attention—not canceling a meeting because a planet made a square.

  1. 1
    Tuesday, December 9

    Mars square Saturn

    100
  2. 2
    Wednesday, December 10

    Neptune stations direct

    100
  3. 3
    Friday, December 12

    Moon square Mars

    100

Built to be checked

A forecast with its working left in.

01

Measure

Every day starts with geocentric tropical planetary longitudes calculated at 12:00 UTC.

02

Compare

Adjacent days expose ingresses, apparent stations, lunar peaks, and the closest daily aspect sample.

03

Rank

Closeness and event type determine emphasis. Dramatic language does not change the score.

04

Interpret

Astronomy is labeled as calculation; symbolic meaning is labeled as reflection, never certainty.

Read the complete calculation model, source series, tolerances, and limitations on How we calculate. Inspect the raw positions for any date in Today’s sky.

The public sky is only half the map

Find out which of these dates are actually yours.

Add your birth minute and place once. The private overlay replaces general planetary weather with exact contacts to your Sun, Moon, Venus, Mars, and the rest of your chart.

Clear answers

Frequently asked questions

What are the major astrology transits in December 2025?
The monthly calendar ranks the exact-aspect samples, planetary sign changes, apparent retrograde stations, and New or Full Moon markers calculated for December 2025. The dated event cards above are the current answer; they are generated from the planetary positions rather than copied from a general forecast.
What is an astrology transit calendar?
An astrology transit calendar places changing planetary positions on a timeline. The public calendar shows transits in the sky that are shared by everyone. The private overlay adds a second comparison: each moving planet is measured against the exact planetary degrees in one birth chart.
How are the dates in this transit calendar calculated?
MyMysticDay calculates geocentric tropical longitudes on its own server and samples the sky at noon UTC each day. It compares adjacent daily samples to identify sign changes, apparent direction changes, lunar illumination peaks, and the date on which an aspect is closest to exact. The displayed date is a daily planning marker, not a claim that every event perfects at noon.
What does “orb” mean in the calendar?
Orb is the angular distance between a measured aspect and mathematical exactness. An orb of 0°20′ is twenty arcminutes from exact and is closer than an orb of 1°10′. The calendar prints the measured orb so readers can distinguish a tight contact from a broad background influence.
Why can a personal transit forecast differ from a zodiac horoscope?
A zodiac horoscope usually starts with one shared sun-sign category. A personal transit forecast compares the current sky with the degrees of your Sun, Moon, Mercury, Venus, Mars, and the rest of your natal chart. Two people with the same sun sign can therefore have different close contacts and different peak dates.
Are personal transit calendars public or indexed by search engines?
No. Public weekly and monthly sky calendars are indexable because they contain no birth data and are identical for every reader. A personal calendar is served with noindex and no-store instructions, uses a canonical link to the private entry page, and does not place a birth date, birth time, or birthplace in its URL.
Does a transit predict that a specific event will happen?
No. The astronomical position and angular separation are calculations; the meaning attached to them is a symbolic framework for reflection. A transit cannot guarantee an event, reveal another person’s thoughts, or replace qualified medical, legal, financial, safety, or mental-health advice.