For the Puerto Rican culture today is a day to be happy and celebrate your heritage.

But for the non-latinas this is the day where caucasians decide to go to Puerto Rico and stay there until the locals get pissed off and send them on a ship back to America.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.