Void-of-Course Moon Calendar 2026

Each row in the table above represents one void-of-course period. The Moon Sign column tells you what sign the Moon is leaving. Last Aspect shows the final planetary contact the Moon made before going void — the type of aspect, which planet, and the exact time. VoC End is when the Moon enters the next sign and becomes active again.

The practical move: scan ahead for your important dates. If you're signing a lease on March 20th, check whether a VoC window overlaps your signing time. If it does, either move the signing earlier or later. If you can't move it, at least know what you're working with — awareness is half the value.

Long VoC periods (highlighted in red, over 12 hours) are the most disruptive for scheduling. Short ones under an hour often pass unnoticed. The medium-length periods (3-8 hours) are the everyday planning concern — they overlap with business hours frequently enough to matter.

The concept goes back at least to Guido Bonatti (13th century), who listed "the Moon being void of course" among the conditions that weaken astrological judgments. William Lilly codified it in Christian Astrology (1647): when the Moon is void, "it shall come to nothing." Both were writing about horary astrology — answering specific questions based on the chart of the moment the question was asked. But the principle migrated into electional work (choosing the right time to act) and eventually into the general astrological awareness of modern practitioners.

In the 20th century, astrologer Al Morrison popularized VoC Moon tracking and studied it empirically. He found correlations between VoC periods and unusual sports outcomes, failed political initiatives, and low-turnout events. His newsletter columns made VoC Moon one of the most widely tracked mundane indicators in Western astrology. Today, business owners, event planners, and everyday practitioners use a VoC calendar as a basic scheduling tool alongside standard planners.