Today is Friday 13th and we wanted to take a look at, whether it is considered lucky and what this has to do with the full moon. Interestingly enough, the interpretation of the number 13 has developed in various directions in different countries and cultures and you can find as many examples for bad luck, as much as the ones that promise good luck, albeit diverse interpretations exist.
In Christianity, 13 is viewed to be a rather unlucky number. For example, the Middle Ages saw Jesus as the thirteenth person of his twelve disciples and the allegory of perfection and divinity. Then again, Judas was made the thirteenth person at the last supper and betrayal and bad luck were attributed. Principally, reflecting number 13 as »12 + 1« seams to be relevant, because 12 is interpreted as entirety. Therefore, the following number 13 can be looked at to be even above entirety (God) and can be seen as the beginning of a new cycle or the destruction of this entirety (devil or death).
In other cultures, 13 was a lucky number. For example, the Aztecs, whose calendar was aligned with the moon phases and consisted of 13-day weeks. Here too, a strong connection to the Gods was prevalent.
Judaism likewise, has a calendar that orientates to the moon and where a lucky and neighbourly connection to full moon becomes evident. The beginning of the month is directly after new moon, hence, full moon is on the 14th of each month, being the middle of the month and one day after the 13th. When full moon falls on a Saturday (the day of rest, Sabbath), this is considered to be lucky. In this case, this lucky day is preceded by Friday 13th.
It is as so often: you can look at something as you want to see it and you will find an argument for it. Probably, it would be wise not to measure ones luck according to external events, but rather find it within. Incidentally, this also includes not to find ones luck on the moon, or in its respective display in the sky. Whether full moon or new moon – luck is something we encounter under different laws.