This is the most popular and best-known definition.
#BLUE MOOM FULL#
The majority of us are familiar with a сalendrical Blue Moon, which is the second Full Moon in a calendar month with two Full Moons. If you want to learn more about the traditional names given to the Full Moon by the Native Americans and other peoples, see our colorful Full Moon Calendar. So the authors had to use a special name for the “extra” Moon to make things work. The now-defunct Maine Farmer’s Almanac calculated and listed all of the Full Moons in a year, along with their traditional names that had to correspond with the particular months. It was marked a “betrayal Moon” to ensure that Lent and Easter corresponded with the right Full Moons and that other festivals would still fall on their “proper” dates.Īccording to the other version, the tradition dates back to the 19th century. The third Full Moon of the season arrived too early and upset the arrangement of Church holidays. In calculating the dates for Lent and Easter, Catholic clergy identified the Lenten Moon (the final Full Moon of winter) and Easter Moon (the first Full Moon of spring). The possible explanation refers to the Christian ecclesiastical calendar. The curious thing about a seasonal Blue Moon is that it’s always the third Full Moon in an astronomical season of four Full Moons. So, every 2.5 to 3 years, we experience an “extra” Full Moon in a season. This falls short of the 365/366 days in a year. However, its exact duration is 29.5 days, which means it takes 354 days to complete 12 lunar cycles. We normally have 12 Full Moons in an astronomical year, as a lunar cycle lasts approximately one month. How often does a seasonal Blue Moon occur? As a rule, each season (defined by solstices and equinoxes) has three months and three Full Moons, but sometimes it has the fourth Full Moon. Seasonal Blue MoonĪ seasonal Blue Moon is the third Full Moon in an astronomical season with four Full Moons. Let’s take a more detailed look at each definition. It has been around for a long time some even trace it back to 400 years ago, when it meant something that could never happen (hence the expression “once in a Blue Moon”).Ī Blue Moon can be seasonal and calendrical. When is the next calendrical Blue Moon?.How often does a calendrical Blue Moon occur?.How often does a seasonal Blue Moon occur?.Read on to learn the true meaning of a Blue Moon. Although such Full Moon is widely known as a Blue Moon, this naming is the result of a mistake. On August 31, 2023, at 01:35 GMT, the second Full Moon in a calendar month will occur.
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