|image from Wikipedia|
One of the definitions of Black Moon is a month without a full moon. This can only occur in a February and only occurs about every 20 years. This month will be the last time until 2037. So get out there and look at that -oh, wait, you can't actually see the absence of a full moon. But there'll be two full moons in March, the second half of a Double Blue Moon, so you can have twice the full moon joy next month to make up for it.
This short video demonstrates the moon phases:
I had never heard of this month-with-no-full-moon occurrence until this month when it's happened twice before during my lifetime. It truly is the case that I learn something new every day!