According to the National Day Calendar, August 8th is Sneak some zucchini into your neighbor’s porch day.
The site tells you how to observe this very special day:
Sneak some zucchini into your neighbor’s porch. Don’t be surprised if your gift delights the recipient, either. Those who have none in their garden are usually excited to have some fresh zucchini, especially if they didn’t have to grow it themselves. To alert others, use #SneakSomeZucchiniIntoYourNeighborsPorchDay to post on social media.
I’m simultaneously hoping that “sneak some zucchini into your neighbor’s porch” is and isn’t some kind of euphemism.
Thanks to Renee Frigault for the find!