Tu B’Av, i.e. the 15th of Av, dates back to the Temple Period, about 1,000 BCE. It is a minor but very happy, even amorous holiday that coincides with the beginning of the grape harvest. Unmarried young women would dress in white and dance in the vineyards to invite attention, maybe even trading their garments with one another to prevent the men from knowing who could and couldn’t afford the more expensive ones.

This holiday is always on a full moon, appropriately. Keep an eye out for the people saying Coptic Vespers while you’re dancing around a vineyard at midnight in somebody else’s clothes.