according to the argentinean version, on july 20th of 1969, which marks the arrival of the man to the moon, enrique ernesto febbraro sent thousands of letters to various countries in many languages to highlight the power and happiness that would come from global union and fraternity.

according to the paraguayan version, which is celebrated on july 30th, the celebration was started by doctor ramon artemio bracho, who in 1958 founded a global crusade for friendship - the values of the partnership, peace, and health were established as priorities, and  represented by social and cultural activities.

the united nations suggested that both dates be joined as they stood for the same message and values - in rio de janeiro, cards, candies and small gifts are exchanged, often to include loved ones and family member in addition to just friends.