The Red Crescent usually appears every few years.

During the total lunar eclipse, the moon is usually red.

Total lunar eclipse is a kind of lunar eclipse. When the moon, the earth and the sun are completely in a straight line, the whole moon walks into the shadow of the earth, and the surface of the moon is dark, forming a total lunar eclipse.

According to the statistics in the "Sharo Cycle", there are about 28 eclipses in a cycle of about 6585 days (18 years), of which 12 to 13 are total solar eclipses. Simply put, there will be a total lunar eclipse every year and a half.

It should be noted that only half the earth (night hemisphere) can see each eclipse, so it takes an average of three years to see the total lunar eclipse in the same area.

Of course, weather and other factors can not be ignored.

In other words, if you are super lucky and have an explosive personality, you can see the Red Moon every three years.

I hope it helps you, there is no place to hide bodhisattvas in the south!