Bloody moon and blue moon are the symbol of bad things

Several daygs ago, bloody moon is shown in the sky. It seemingly made many people very excited. As a matter of fact, they love bloody moon and even blue moon and something like that .
However, bloody moon is the symbol of bad things in old times. In fact, bloody moon really brings us some bad things. It is said that because of bloody moon, water city venice has no water more. That is reall bad. Do you think so ?