Many people say the crimes that take place on earth have a connection with the moon,
i.e., when it becomes a full moon, claiming that they have heard that in some Hadith of the Prophet (peace be upon him). Is this statement true?
What is mentioned in the question about the crimes that take place on earth having a relationship with the moon when it is full is not true. There is no basis for this in the Book of Allah or in the Sunnah of the Prophet (peace be upon him). This is a Bid‘ah (innovation in religion) created by superstitious fortune-tellers and charlatans, who try to control the minds of ignorant and naive people and thereby facilitate falling into crimes and sins. It is obligatory for anyone who has committed these things to make sincere Tawbah (repentance to Allah) and perform worship sincerely and solely for Allah Alone. Allah (Exalted be He) is the Sole Disposer of all affairs and He Alone is the Creator of everything, with no partner or associate. He Alone has the Power to bestow benefit or inflict harm. (Part No. 1; Page No. 231) The matter is in His hand, whatever He wills happens and whatever He does not will does not happen.