Everything we've covered on moon timing so far (phases, eclipses, blue moons, supermoons) is visible if you know to look for it. Void of course is different: it's an astrological window you can't eyeball, and it says nothing about which phase you're in.
What it actually is
In astrology, the moon moves through the zodiac, making aspects (angles) to other planets as it goes. "Void of course" describes the period after the moon makes its last major aspect before it exits one zodiac sign and enters the next: a kind of in-between window with no active planetary conversation happening. It can last anywhere from a few minutes to well over a day.
The traditional advice
The old astrological rule of thumb is that things started during a void of course moon tend to fizzle, go nowhere, or not turn out as planned: not because anything is being punished, more that the energy for genuinely starting something new isn't fully available yet. Traditionally it's considered a poor window for signing contracts, launching a new project, or casting a spell meant to manifest something new.
What it's well suited to instead: rest, review, tidying up loose ends, minor maintenance rather than new beginnings, and release or banishing work: since you're not trying to start anything, the "in-between" quality doesn't work against you the same way.
How to check for it
Unlike a full moon, you can't tell you're in a void of course window just by looking outside. A free astrology app or online ephemeris will list void of course times for your location, usually a few minutes ahead of when you'd need it.
A practical note
As with every timing concept on this blog: this is one more optional data point, not a rule that overrides your actual life. If you need to sign something or start a working today and it happens to fall in a void of course window, do it anyway: treat this as something to plan around when you have the flexibility to, not something to feel bound by.
