The Moon changes signs every two or two and a half days, and passes through all 12 signs of the zodiac every 27 and 1/3 days—that's one sidereal month. So, that means every two or three days, the Moon is going to spend some time void of course!

Here is a sample page of the We'Moon planner where I have circled in red the V/C notation. The datebook makes it so easy to keep track of when the Moon is void of course.  

Look for when the moon goes into the next sign. That's when the Void Moon ends. (ex: on the 24th, the Moon goes VoC at 2:58pm, and VoC ends at 11:36pm when the Moon changes into the sign of Leo { ☽ →  ♌︎ } 

Skip the line* and buy the newest edition of the We'Moon datebook, where we mark every Moon VoC for you!  

* There is no line. All are welcome here. ~Love, we of We'Moon