Little is documented about who first recorded this laugh and the words dia lindo, so its history is really the history of its sharing as a short soundboard clip. Passed around in chats and edits, the Portuguese phrase travels well even for listeners who do not speak the language, because the giggle makes the meaning clear. It has settled into use as a tiny good-day greeting, a reaction to bright weather, cute photos and good news, valued because it says a lot of warmth in less than two seconds.