I am aware of it and have been for more than a decade but… I only ever remember sometime after it’s passed. Every year. I’ll spot the leftover merch at my preferred bookstore the next time I’m there and go “Oh, right.”
IIRC it started at about the same time as 'Indie Record Store Day'; both are on Saturdays in April.
I shop at brick-and-mortars for whatever I can, and very much regret those gone missing because of the Great Monopolist. I really valued being able to examine many products before purchase.
