I made this invitation for ‘Koppermaandag’ (the first Monday after Epiphany) in the form of a puzzle so I wouldn’t have to do any more wishing for the rest of the year. On this day the printers’ companions printed a special print as a test of their professional competence. This print, often with a congratulation, was handed over to the master printers or the owner of the printing house. Copper Monday probably dates from the Middle Ages, first as a holiday of the guilds, later only used in the printing industry. Most guilds were abolished in the 18th century, so their use disappeared. The tradition of the Copper Monday print is also slowly disappearing in the printing industry.