Why do newborn babies are exposed to sunlight does this have any scientific reason?

Newborn babies are often exposed to sunlight for brief periods to help their bodies produce vitamin D, which is essential for healthy bone development and immune function. Sunlight triggers the skin to synthesize vitamin D when UVB rays penetrate the skin. However, it's important to ensure that this exposure is limited and safe, as newborns have sensitive skin that can be easily damaged by direct sunlight. Parents are generally advised to seek shade and use protective clothing or sunscreen for infants when outdoors.