For decades, the song was under a controversial copyright held by Warner/Chappell Music , which collected millions in royalties annually from commercial uses. However, after a 2013 lawsuit, a federal judge ruled the copyright invalid in 2015, officially placing the song in the public domain in 2016. 2. Psychological and Social Impact
Is the Happy Birthday Song Copyright Protected? - Trademarkia
The act of singing "Happy Birthday" serves as a powerful psychological tool for social bonding and individual validation.