What is a Black Moon

Picture P29In some languages of Nordic people there are more than a dozen definitions for ‘snow” that shows a role the snow plays in their life. Something similar happens with the Moon, though we have one word “Moon” we love diversifying it as Blue Moon, Cold Moon, Super Moon, Red Moon, Black Moon… In recent years the term ‘Black Moon’ has been made rather popular by astrologers and followers of some religions, but at the same time Black Moon is not well known in the astronomy world where there is even no single accepted definition of Black Moon.

In Astronomy this term has been commonly used to refer to any of the following phenomena associated with the New Moon:

Second New Moon in a calendar month: These Black Moons occur relatively often, once every 2.5 years;

Third New Moon in a season of four New Moons. Astronomers divide a year into four seasons – spring, summer, fall (autumn) and winter. Usually, each season has 3 months and 3 New Moons. When a season has 4 New Moons, the 3rd New Moon is called Black Moon;

Calendar month without a New Moon. This can only happen in the month of February. When this occurs, January and March have two New Moons, instead of the usual one New Moon – this case was mentioned in The Luminaries by Eleanor Catton as a mystic period of time when the most unexpected things can happen;

Calendar month without a Full Moon. About once every 19 years, the month of February does not have a Full Moon. Instead, January and March have two Full Moons each – also looks quite mysterious.

Interestingly that all these cases refer to a beyond the scope Moon position and we will have a chance to see (or not to see) some of them in the future:

 30 Oct 2016                  Second New Moon in a single calendar month

21 Aug 2017                  Third New Moon in a season with four New Moons

Feb 2018                        Calendar month without a Full Moon

30 Aug 2019                  Second New Moon in a single calendar month

Source: http://www.timeanddate.com/


4 thoughts on “What is a Black Moon

  1. Pingback: What was New for August 2017 | ASTROLOGIC DIARY

  2. Hi,

    Just following up as I didn’t hear back from you, sorry to email you again. I noticed your page astrologicdiary.wordpress.com/2016/04/06/what-is-a-black-moon/ links to http://www.timeanddate.com. Unfortunately, that site isn’t very accessible for the sight impaired. Would you consider adding a link to a more accessible version like http://www.thetimenow.com which is WCAG 2.0 compatible?Date and Time – All Time Zones and Stuff

    Also, if you ever want to see how accessible a page is, I recommend wave.webaim.org. It is really helpful.

    Shane Buck


    • Hi,

      Thanks much for your message and useful info, please, sorry if I missed your previous message but I found nothing… thetimenow.com is a very interesting source, thanks again… I put the link to timeanddate.com just because I used some info from this site preparing the particular post… If I use info from thetimenow.com I will definitely add the link, I promise! 🙂

      Thank you and kind regards,


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