September 2026 Astrology Calendar — Key Dates, Moon Phases & Retrogrades
Every major astrological event in September 2026, what it means, and the best days to act — all on one page.
Key Astrology Dates in September 2026
Mars in Cancer squares Saturn in Aries
The month opens on friction. Mars, in the sign where it is weakest, hits a hard angle to a retrograde Saturn: plans meet a wall, tempers go sideways, and frustration hides as tiredness. Do the boring thing properly instead of the bold thing badly — it passes within three days.
New Moon in Virgo
The first non-eclipse New Moon since July, at 18° Virgo. Set intentions around health, work, systems and service. It is a modest, practical seed — exactly what you need after August — and it grows steadily rather than dramatically.
Venus enters Scorpio
Love turns from charming to consequential. Venus in Scorpio wants depth, loyalty and the truth, and it is already in the shadow of its October 3 retrograde — so relationships and money decisions made from here on are drafts, not final copies.
Mercury enters Libra
Thinking turns diplomatic. Three weeks of easy negotiation, fair hearings and beautifully worded messages — with a tendency to see both sides so clearly that you decide nothing.
Uranus stations retrograde in Gemini
Uranus reverses at 5° Gemini until February 8, 2027. The rapid changes in how you communicate, learn and connect since spring slow down for review. Tech, transport and information glitches spike for a few days around the station.
Chiron retrogrades back into Aries
The wounded healer, retrograde since early August, slides back across the Taurus–Aries border for a final stay in Aries. A confidence wound you thought you had closed reopens gently — this pass is the last one, and it is here to finish the job.
Mercury opposes Saturn
Words meet resistance. A no, a delay, or a conversation with someone in authority that feels heavier than it should. Say less, document more, and do not take the silence personally.
Sun enters Libra — Autumn Equinox
Day and night balance at 8:05 pm EDT and Libra season begins. The year turns toward partnership, fairness, beauty and the other person. What was about self-improvement in Virgo season becomes about how you treat people.
Full Moon in Aries (Harvest Moon)
The Harvest Moon at 3° Aries lands directly on retrograde Neptune. Something about independence, anger or a personal ambition comes to a head — but the picture is blurred, and what looks like a betrayal on the 26th often turns out to be a misunderstanding by the 28th. Feel it; do not act on it yet.
Mars enters Leo
Mars escapes Cancer and joins Jupiter in Leo until November 25. Energy returns with confidence, generosity and a taste for the spotlight. The most productive stretch of the autumn starts here.
Mercury enters Scorpio
Conversations go beneath the surface. Mercury joins Venus in Scorpio and thinking gets investigative, private and pointed — the run-up to October’s Mercury retrograde begins.
September 2026 Moon Phases
| Dates | Moon phase | Best used for |
|---|---|---|
| September 1 – 9 | Waning Moon | Digest August. Clear the last eclipse debris, finish what the Pisces Lunar Eclipse ended, and keep the Mars–Saturn square on the 1st from turning into a fight. |
| September 10 | New Moon in Virgo | The seed of the autumn. Set one practical, measurable intention — a routine, a health change, a system — and start it the same week. |
| September 11 – 25 | Waxing Moon | Build. Mercury in Libra makes negotiation easy and the equinox on the 22nd shifts the focus to partners; the 19th–25th is the best stretch for agreements. |
| September 26 | Full Moon in Aries (Harvest Moon) | Culmination, with fog. A personal matter peaks conjunct Neptune — wait 48 hours before you act on what you think you saw. |
| September 27 – 30 | Waning Moon | Mars in Leo arrives on the 27th. Use the last four days to point the returning energy at the thing the August eclipse asked you to build. |
Retrogrades in September 2026
| Planet | Sign | Retrograde window | What to do |
|---|---|---|---|
| Uranus | Gemini | from September 10 (until February 8, 2027) | Change of mind, change of route. The reinventions of the past five months in communication, learning and technology go into review. |
| Saturn | Aries | all month (July 26 – December 10) | Structures around identity and independence remain under inspection. Mars squares it on the 1st — the month’s most frustrating day. |
| Neptune | Aries | all month (July 7 – December 12) | The Harvest Moon sits on it on the 26th, making that Full Moon unusually foggy. Verify before reacting. |
| Pluto | Aquarius | all month (May 6 – October 15) | Final weeks of Pluto’s review. Power dynamics in groups and networks resolve before it turns direct in October. |
| Chiron | Taurus → Aries | all month (re-enters Aries September 17) | A last pass over old wounds about self-worth and courage. Tend, do not pick. |
| Mercury | — | direct all month | No Mercury retrograde in September. It moves from Virgo to Libra on the 10th and to Scorpio on the 30th; the next retrograde begins October 24. |
| Venus | Scorpio | direct, but in pre-retrograde shadow all month | Venus stations retrograde on October 3. Relationship and money decisions made from September 10 are likely to be renegotiated in October and November. |
Best Days in September 2026
| Love | September 19 – 25, with Mercury in Libra and the Sun arriving there on the 22nd — before Venus’s shadow deepens |
|---|---|
| Career moves | September 10 – 12 (New Moon in Virgo) and September 27 – 30 (Mars in Leo) |
| Big decisions & signing | September 10 – 17, before Mercury opposes Saturn; avoid the 1st and the 18th |
| Rest & reflection | September 1 – 4 and the Harvest Moon weekend, September 26 – 27 |
Track Every Date Automatically
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How These Dates Affect Your Sign
The same sky lands differently for every sign — the Mercury enters Scorpio that energizes one sign closes a chapter for another. Read yours: