Of course, this is the vernal equinox of the earth. The word "vernal equinox" comes from the Latin words "equality" and "night". In essence, it is a biannual event, that is, the sun is directly above the equator. No matter which side of the earth's equator you live on, Google graffiti can display different commemorative patterns. Those who saw the end of summer in the north saw autumn graffiti with bright yellow leaves on it. At the same time, users in the southern hemisphere will look at budding patterns, representing the warmth and new life of the future.