December 2026 Celestial Calendar
Written and reviewed in house by the AstroStarCheck research team. Astronomical positions come from the Swiss Ephemeris; interpretive rules are checked against the classical texts listed under Sources.
Month at a glance
17 celestial events this month · Busiest day: 2026-12-17 (2 events)
- Exact Aspect × 10
- Sign Change × 3
- Retrograde Ends × 2
- New Moon × 1
- Retrograde Begins × 1
- · Mars square Uranus
- · Venus Sign Change → Scorpio
- · Mercury square Jupiter
- · Mercury Sign Change → Sagittarius
- · Mercury opposition Uranus
- · Venus quincunx Uranus
- · Mercury square Mars
- · Venus sextile Mars
- · Saturn Retrograde Ends
- · Neptune Retrograde Ends
- · Jupiter Retrograde Begins
- · New Moon (Sagittarius)
- · Mars quincunx Saturn
- · Sun trine Jupiter
- · Uranus sextile Neptune
- · Mercury trine Jupiter
- · Mercury Sign Change → Capricorn
12 2026 Aspect Dynamics and Astronomical Overview
December marks the winter solstice culmination and Capricorn's architectonic season, registering 17 celestial events. Year-end consolidation pairs with long-term accountability to close the annual cycle with stability.
Three-Phase Monthly Transit Breakdown
First Decan (Days 1–10): Early Momentum & Strategic Setup
- 2026-12-02: Mars square Uranus
- 2026-12-04: Venus Sign Change → Scorpio
- 2026-12-04: Mercury square Jupiter
- 2026-12-06: Mercury Sign Change → Sagittarius
Second Decan (Days 11–20): Peak Aspect Tension & Pivot Points
- 2026-12-11: Saturn Retrograde Ends
- 2026-12-12: Neptune Retrograde Ends
- 2026-12-13: Jupiter Retrograde Begins
- 2026-12-17: New Moon (Sagittarius)
Third Decan (Days 21–End): Ingress Transitions & Integration
- 2026-12-22: Uranus sextile Neptune
- 2026-12-23: Mercury trine Jupiter
- 2026-12-26: Mercury Sign Change → Capricorn
Element-Specific Monthly Strategies
Fire Signs (Aries, Leo, Sagittarius): Winter solstice demands concentrated grit; focus sharp energy strictly on decisive closing sprints.
Earth Signs (Taurus, Virgo, Capricorn): Capricorn solar power initiates architect mode; anchor institutional structures for the coming decade.
Air Signs (Gemini, Libra, Aquarius): Audit annual archives without sentimentality; distill core principles to navigate next year's compass.
Water Signs (Cancer, Scorpio, Pisces): Prioritize quiet sanctuary at year-end; recharge psychic batteries to welcome solstice renewal.
Key Celestial Timing Checklist
- [2026-12-17] New Moon (Sagittarius): Focus on setting clear intentions and reviewing current milestones.
- [2026-12-11] Saturn Retrograde Ends: Pace strategic moves and review key agreements thoroughly.
- [2026-12-04] Venus Sign Change → Scorpio: Adapt to shifts in practical focus and adjust daily routines.
Sources and further reading
Astronomical positions and interpretive rules on this page are checked against these works.
- Swiss Ephemeris (Astrodienst) (the ephemeris library behind every chart calculation)
- Firdaria (AstroWiki)
- Hellenistic astrology (historical and technical resources on Hellenistic practice)
- Ptolemy, Tetrabiblos. Loeb Classical Library, 1940. LacusCurtius, University of Chicago