A world season calendar is like a big schedule that tells us when different seasons happen in different places around the world.
Do you know what seasons are? They are different times of the year when the weather feels different. For example, in some places, winter is really cold and snowy, while in other places, winter is just a little bit chilly.
Now, since the Earth is so big, different parts of it have different seasons at different times. This is because the Earth is tilted, which means it gets more sunlight at some times of the year and less at other times.
A world season calendar helps us keep track of when different parts of the world have different seasons. It shows us which parts of the world are having spring, summer, fall, or winter at any given time.
This can be helpful for lots of things. For example, if you are a farmer and you grow crops, you need to know when the growing season is for your area. Or if you are planning a vacation, you might want to go somewhere that has nice weather during the time you want to go.
So in short, a world season calendar is a big schedule that helps us keep track of when different parts of the world have different seasons.