Auld Lang Syne is a very famous poem. The original is Scottish, which probably means a long-lost day. According to local elders, Auld Lang Syne was written by robert burns, a Scottish poet in the 8th century. This poem was later set to music. In addition to the original Scotland, this song has been set as the local language in many countries. It's definitely a world-famous song, and basically people all over the world have heard it. But many people are too familiar with this melody, and they know where this song always appears. They remember the mood, but they can't remember its name. Throughout China, it is often called "Auld Lang Syne". People can usually hum the melody of a song, but most people can only sing a short lyric.
The classic song in "Blue Bridge of the Mind", "Its. A is wonderful. Life and When Harry Met Sally.