International Lego Day 2025. International lego day is on sunday, with celebrations to mark the event. As the danish clock struck 13:58 on this day in 1958, the patent for the design of the lego brick was filed in denmark.
On international lego day in 1958, danish carpenter godtfred kirk christiansen received a patent for the first lego brick. It celebrates the day that the first patent for the globally famous interlocking plastic brick was submitted in denmark, the home country of the lego.