I’m sure they’re not doing it for Monty. : ) They’re commemorating the heroism of those who sacrificed for their freedom.
‘Zactly. While the Netherlands has fallen into the European PC culture, they still remember the sacrifices made to liberate them. In Ottawa, in May, occurs the Tulip Festival. In 1945, the Dutch Royal Family sent 100,000 tulip bulbs to Canada, as a thank you for sheltering then Princess Juliana during the Nazi occupation. They continue to send 10,000 tulip bulbs annually.
A daughter of Princess Juliana was born at the Ottawa Civic Hospital in 1943. To ensure that Princess Margriet had exclusively Dutch nationality, rather than dual citizenship, ensuring her remaining in the line of succession, that floor of the Hospital was declared extraterritorial.
In addition, the Canadian Army was tasked with clearing the Scheldt, to allow Allied supplies to arrive via the port of Antwerp. The Canadian Army liberated much of Southern Netherlands and are well remembered.