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Moon Void-of-Course Calculator

Calculate precise Moon Void-of-Course (VOC) periods for any location and date. The Moon is VOC from its last major aspect until it enters the next sign — avoid initiating important ventures during this "cosmic dead zone."

What You Get

  • Precise VOC start/end times for any location and date range
  • Real-time current VOC status with live countdown
  • Last aspect before VOC + next sign ingress time
  • 7-day VOC forecast with copyable schedule
  • Traditional interpretation: "Nothing comes of matters begun under VOC Moon"
  • Swiss Ephemeris precision (same as NASA JPL)
  • Works offline after first load — no signup, no tracking
New York, NY, USA — 2026-09-03 to 2026-09-10
🌙

Calculating VOC status...

Enter location and date to check current Moon VOC status

Date VOC Starts VOC Ends Duration Last Aspect Next Sign

Free Web Tool vs Premium Android App

FeatureFree WebLunar Phase Calculator App
Moon VOC periods for any date/location✓✓
Real-time VOC status with countdown✓✓
Last aspect + next sign ingress✓✓
7-day VOC forecast✓✓
Real-time Moon phase & illumination✗✓
Ritual timer & lunar journal✗✓
Planetary hour calculator✗✓
Works 100% offline✗✓
PriceFree$3.99

"The VOC calculator saved me from launching a major sigil during a 14-hour void period. Lunar Phase app added the ritual timer and journal — now I only launch during applying aspects. My success rate jumped from ~30% to ~70%."

— Thomas R., verified purchaser, Lunar Phase Calculator

Free vs Premium

What exactly is "Void of Course"?
The Moon is "Void of Course" from the moment it makes its last major Ptolemaic aspect (conjunction, sextile, square, trine, opposition) to any planet until it ingresses into the next zodiac sign. Traditional astrology considers this a "dead zone" — initiatives started during VOC rarely complete as intended. Best for: routine tasks, introspection, banishing. Avoid: launches, contracts, surgeries, major rituals.
How accurate are the calculations?
Uses Swiss Ephemeris (NASA JPL precision). Calculates exact aspect times (applying/separating orbs: 8° for conjunction/opposition, 6° for trine/square, 4° for sextile) and exact sign ingress times. Accounts for latitude, longitude, timezone, DST, and lunar parallax.
Does the premium app need internet?
No. 100% offline. Swiss Ephemeris data embedded. All calculations local. No accounts, no telemetry.

🌙 Master Lunar Timing for Results

VOC awareness is the foundation. The Lunar Phase Calculator Android app gives you: real-time Moon phase/illumination, ritual timer with planetary hour alerts, lunar journal with photo/audio notes, planetary hour calculator, and daily VOC alerts via Android notifications — all offline.

Real-time Phase VOC Alerts Ritual Timer Offline
$3.99
🌙 Get Lunar Phase Calculator

100% offline · No ads · No tracking · One-time payment · 7-day guarantee

Lunar Phase Calculator — Phase + VOC + Timer $3.99 Phase · VOC · Ritual Timer · Planetary Hours Get App →
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Take this offline with the app

This tool runs in your browser and nothing is saved after you close the tab. The app keeps a library, a journal and works in aeroplane mode. One-time payment, no subscription, no ads.

Get Lunar Phase Calculator — $3.99 Get all 12 apps for $29.99 → All books in English — $29.99

✦ Astral Lab: Natal Chart & Astrology

Moon, phases and planetary hours on real data Lunar Phase Calculator computes phases, illumination and planetary hours from ephemeris data, not approximations. Works with no signal at all.

$6.99
GET IT ON Google Play

One-time payment · no ads · no subscription

✦ Want the written method instead?

The free tool is the surface. This is the system behind it, in writing, to keep and re-read between sessions.

Codex Chaoticus: Complete Treatise on Chaos Magick

$4.99
Get the PDF →

PDF · one-time payment · no subscription

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