Friendship Day is a day in several countries for celebrating friendship. It was initially promoted by the greeting card industry; evidence from social networking sites shows a revival of interest in Friendship Day that may have grown with the spread of the internet, particularly in India, Bangladesh, and Malaysia. Mobile phones, digital communication, and social media have contributed to popularize the custom. Those who promote the day in South Asia attribute the tradition of dedicating a day in honour of friends to have originated in the United States in 1935.