According to a 19th century history book, “The day of the wedding the klezmer had to arrive early in the morning to play a gut-morgn for the parents of the bride and groom.” Another source from the 1830’s states that Gut Morgn and “similar” songs were played for guests for several days following the wedding. (Google “Zizmor, 1922a, p. 874” for a bit more information.)