Overall, on days when a country gets one more hour of sunlight than its annual average, the valence of its streams increases by 0.6%. Finland’s mood in July is 11% happier than usual. The icy north shows the biggest seasonal swings. A few Latin American countries lack such a dip, perhaps because the algorithm sees Latin music as mostly happy. Strikingly, this February slump occurs in some countries near the equator, such as Singapore, and far south of it, such as Australia-even though their musical tastes differ. The most joyful spike comes at Christmas. In July, the perkiest month, the mood is 3% higher. The global top 200 songs are gloomiest in February, when their valence is 4% lower than the annual average. We gathered data for 30 countries around the globe, including 46,000 unique tracks with 330bn streams, to identify the annual nadir of musical mood. Since 2017 Spotify has also published daily tables of the 200 most-streamed songs, both worldwide and in each country. The algorithm is trained on ratings of positivity by musical experts, and gives Aretha Franklin’s soaring “Respect” a score of 97 Radiohead’s gloomy “Creep” gets just 10. The firm has an algorithm that classifies a song’s “valence”, or how happy it sounds, on a scale from 0 to 100. Our calculations use data from Spotify, which offers 50m tracks to 270m users in over 70 countries, mostly in Europe and the Americas.
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