It was dark tonight on my walk in the woods. The days are getting shorter, but tonight is a New Moon which is sometimes called a Black Moon. That’s a popular term, not a scientific one, but the lack of a visible Moon tonight does make it a dark night.
A New Moon is the first phase of the Moon, occurring when the Moon and the Sun have the same elliptical longitude.
Halloween is a month away and the New Moon will occur in October 2016 the night before Halloween. That makes us think of the Black Moon being associated with Wicca and black magic.
Wikipedia says that a Black Moon can be a reference to any one of four astronomical events:
1. the second occurrence of a new moon in a calendar month
2. the third new moon in a season that has four of them
3. the absence of a full moon in a calendar month (which happens sometimes in February when January and March each have a second full moon)
4. the absence of a new moon in a calendar month which can only occur in February.
For some, any New Moon is a “black moon” because of the darker night.
Tonight’s Black Moon officially occurred at 8:11 p.m. ET, but for people in the Eastern Hemisphere, it will already be after midnight on Oct. 1 when it occurs. That means that on the other side of the globe it won’t technically be a “black moon” there.
Holidays guided by the lunar calendar are often made to coincide with things like the appearance of a crescent moon (which happens a few days from now). This will usher in the Jewish New Year, Rosh Hashanah, beginning Sunday evening Oct. 2, and the Islamic New Year, Muharram, on Monday, Oct. 3.