The publication “economist” analyzed data from Spotify, 50 million tracks from 270 million users in 70 countries. Spotify’s algorithm uses a scale from zero to a hundred to determine happy-sounding notes, songs like Adele’s “make you feel my love” scores a heart wrenching 10 while “Shake It Off” by Taylor Swift scores a happy 90.

The most listened 200 songs are saddest during February by 4% and the happiest in July by 3%. Latin music was the most joyful, although Spotify’s algorithm tends to mistake sad Latin music with happiness. Northern areas like Scandinavia showed the most prominent mood swings. When the place only gets an hour of sunlight, It can have consequences. They make up with this in the summer months, with an 11% increase in the most significant average swing in the data set.

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