Hey there kiddo, do you know what the vernal equinox day is? No worries, it's just a special day that happens two times a year. It happens in the springtime and it means that the day and night are almost the same length.
You see, during the rest of the year, the Earth is tilted on its axis which means that some parts of the planet are closer to the sun and some are farther away. But during the vernal equinox day, the Earth is at a special position where it's not tilted as much, and that's why day and night are almost the same length.
This special day celebrates the beginning of spring which is a lovely season when flowers start to bloom and the weather gets warmer. It's a day that reminds us to appreciate the beauty of nature and enjoy the changing of seasons. So go outside and enjoy the sunshine and beauty of spring!