It seems amazing, but today’s Classical Connections article is celebrating its 400th birthday. The place was packed with noisy children none of whom I knew, for the birthday boy was a year older than me. Happy Birthday to You was intended for kindergarten children and composed in the 1890s by two American sisters, Patty and Mildred Hill. In 1912, the same melody appeared in print with the now-familiar birthday words but it’s uncertain who wrote them. But in 1988, the massive publishing conglomerate Warner/Chappell Music bought the Clayton F. Summy Company for $25 million.