The Moon becomes void in a sign when she reaches her last connection with another planet until she enters a new sign.
Traditionally this would be the last aspect to one of the visible planets (up to Saturn) but modern software tends to use the outer planets (through Pluto).
Your calendar uses the Ptolemaic aspects (△ ☌ ✳ □ ☍ ) to the planets (☉ ☿ ♀︎ ♂︎ ♃ ♄ ♅ ♆ ♇ )
The Moon becomes void about every two days and the time spent in this energy can range from minutes to days.
Great for:
- Deep work
- Journaling
- Relaxation
- Meditation
Not ideal for:
- Starting new projects
- Magical rituals
- Signing contracts
- Important meetings