What are some neighborhood specific, silly celebrations that occur around Seattle?

I was just reading an article about the annual sharpening of a 20-foot tall pencil sculpture in Minnesota that drew (pun intended) more than a 1,000 people this year to celebrate. What are the Seattle equivalents?

https://apnews.com/article/minnesota-where-is-big-pencil-sharpening-13bdada274a6beeb7327ebefbee639d9