This melody, as well as the accompanying text, is known by most German children. It’s sung on the day of St Nicolas when children are waiting for dark to fall and St Nicolas coming by and putting little presents in the prepared boots.
Let us all be cheery and bright and look forward to Nicolas' night. Merrily, merrily, ding ding dong! It's Nicolas' evening before too long.
It’s written on the picturesque house façade of this house in Hornbach: