Queen's Day

Queen's day is approaching soon. The whole country dresses up in Orange, runs street stalls to sell their bric a brac and gets pissed. Oh and nearly every house puts out the flag. It's strange that the UK doesn't have a Queen's Day. In fact as this article points out most English people don't even know when St. George's Day (the nearest equivalent) is.
I find it quite paradoxical that the Netherlands , which in many ways is such a meritocracy, celebrates what is essentially a feudal institution (the monarchy) with so much gusto. Meanwhile I would be willing to bet that 95% of households in Britain neither have a flag nor a pole to run it up.