"Sto lat" (One Hunred Years) is a traditional Polish song that is sung to express good wishes to a person. The song's author and exact origin are unattributed. The song is sung both at informal gatherings (such as birthdays or name days) or at formal events, such as weddings; it was played, for example, at the presidential inauguration of Lech Kaczyński and during visits by Pope John Paul II. At state events it is not unusual to hear it performed by an orchestra or a military band. It is also noted for being an integral part of Polish immigrant culture even long after assimilation at birthdays or other important events.