GIS Day is a special day that celebrates geography and how it helps us learn more about the world! On GIS Day, people learn all about Geographic Information Systems (GIS), which is a technology that helps us map and analyze data related to location. GIS is used in many different kinds of work including helping people plan where to build new houses and buildings, predicting weather patterns, and studying how different habitats can be used for different activities. GIS plays an important role in helping us understand our planet and make smarter decisions about our future. On GIS Day, people come together and learn about this important technology to help us understand the world around us.