Tonight, Friday, September 30, 2016, is a Black Moon. A Black Moon is the opposite of a Blue Moon. The lay definition of a Blue Moon is the second Full Moon in a calendar month. So a Black Moon is the second New Moon in a calendar month.
Both Blue Moons and Black Moons occur on the first day of a month and the last day of a month. February, because it only has 28 or 29 days (Leap Year), can not have either a Blue Moon or Black Moon. However, such moons can appear in the other 11 months.
There are other definitions of Black Moons, just as with Blue Moons. For example, a calendar month with no Full Moon or New Moon is also sometimes said to be a Black Moon. This definition can only occur in February because it is the shortest month of the year. Likewise, the third New Moon in a season that has 4 New Moons is also said to be a Black Moon. The same is also true for Blue Moons.
As far as magical significance goes, since Black Moons are the New Moon then tonight would be a good time for spells for new ventures and beginnings. Just as with the Full Moon, a New Moon will last about 3 days. So this Black Moon started yesterday, will continue today, and will conclude tomorrow.
The next date of a Black Moon will be on February 18, 2017. It will be the variety that is the 3rd New Moon in a season that has 4 New Moons.
There's no need to try to go outside to see the Black Moon, as there is nothing to see. It will just be a moonless night, like with every New Moon. If you want to take advantage of the darkness to try to see the stars and planets the tonight, weather permitting, would be a good night to do so.