On July 15th, a Catalan person would wear shorts and a t-shirt because it would be summer in Catalonia. A Norwegian would wear a summer jacket and jeans because while it is summer in Norway, it is cooler there due to its location nearer the North Pole. An Australian would wear a jumper, jacket and trousers, as it would be winter in Australia on July 15th, with the seasons opposite between the northern and southern hemispheres due to the Earth's tilted axis.