Positive Thinking Day is celebrated on September 13 every year to highlight the rewards of positive thinking. Positive Thinking Day is all about thinking positive thoughts. It’s easy to be pessimistic and cynical about things — which is not entirely bad because it prepares you for the worst. However, too much negativity can have an adverse impact on our emotional well-being. Research says that you can prolong your life with happiness and optimism. So, on Positive Thinking Day, and other days too, train yourself to see the bright side in every situation and keep a positive attitude always.