Jamrud is an Indonesian rock band formed in the early 1990s, and 'Selamat Ulang Tahun' — meaning 'Happy Birthday' — appeared on their 1998 album Terima Kasih. The song quickly became Indonesia's default birthday anthem, played at parties, schools and offices across the country, and its shout-along chorus has made it a staple of celebration videos online. Years later, the track found a second life on TikTok and meme pages, where its high-energy opening is used to mark birthdays, anniversaries and comedic 'survived another year' moments.