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
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Calculating VOC status...
Enter location and date to check current Moon VOC status
Next VOC Period Starts
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VOC Ends (Next Sign)
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Last Aspect Before VOC
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Date
VOC Starts
VOC Ends
Duration
Last Aspect
Next Sign
Free Web Tool vs Premium Android App
Feature
Free Web
Lunar Phase Calculator App
Moon VOC periods for any date/location
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Real-time VOC status with countdown
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Last aspect + next sign ingress
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7-day VOC forecast
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Real-time Moon phase & illumination
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Ritual timer & lunar journal
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✓
Planetary hour calculator
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Works 100% offline
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✓
Price
Free
$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.
