Today world celebrates the International Friendship Day.

As Wikipedia informs the day has been celebrated in several southern South American countries for many years, particularly in Paraguay, where the first World Friendship Day was proposed in 1958.

Initially created by the greeting card industry, evidence from social networking sites shows a revival of interest in the holiday that may have grown with the spread of the Internet, particularly in India, Bangladesh, and Malaysia. . Those who promote the holiday in South Asia attribute the tradition of dedicating a day in honor of friends to have originated in the U.S. in 1935, but it actually dates from 1919. The exchange of Friendship Day gifts like flowers, cards and wrist bands is a popular tradition of this occasion.
Friendship Day celebrations occur on different dates in different countries. The first World Friendship Day was proposed for 30 July 1958.

However, the Day is celebrated on various days in various societies.

Friendship Day was originally promoted by Joyce Hall, the founder of Hallmark cards in 1919.