"The Festival of Drunkenness is a religiously significant celebration that was held annually (said to be biannually in some places) by the ancient Egyptians. The background story for the celebration of this festival can be found in a text known as The Book of the Heavenly Cow [next video]. In this text, there is an ancient Egyptian myth involving the destruction of mankind. According to the myth, human beings were saved from extinction thanks, in part, to alcohol." Source: Ancient Origins (2016).
From what I've read, the Festival of Drunkenness wasn't just a big celebration with some harmless social drinking; it was about getting completely plastered and passing out to commemorate how booze saved humanity from the bloodthirsty warrior goddess, Sekhmet:
"According to the story, Ra had become weary of people's endless cruelty and nonsense and so sent Sekhmet to destroy them. She took to her task with enthusiasm, tearing people apart and drinking their blood. Ra is satisfied with the destruction until the other gods point out to him that, if he wanted to teach people a lesson, he should stop the destruction before no one was left to learn from it. Ra then orders the goddess of beer, Tenenet, to dye a large quantity of the brew red and has it delivered to Dendera, right in Sekhmet's path of destruction. She finds it and, thinking it is blood, drinks it all, falls asleep, and wakes up as the gentle and beneficent Hathor." (Ancient History Encyclopedia)
In other words, all it took to transform the homicidal blood-slurping Sekhmet (often represented as a lion) into Hathor, the goddess of "music, dance, joy, love, sexuality and maternal care" (often represented as a cow) was to get Sekhmet drunk. I also like the bit about how Ra had to be reminded that there was no point in killing everybody if his goal was to teach people a lesson. This is a great story, much more human than the legend of Yahweh exterminating his own creations (humans as well as animals) in a flood.
Note: According to the Ancient Architects video at the top of this post, the Festival of Drunkenness "could potentially explain the original pre-dynastic origins of the Great Sphinx - as a bloodthirsty statue of an Egyptian lion goddess."
Ancient Egypt is normally seen as kind of austere and grim, but the Egyptians had all sorts of feasts and banquets and they liked their beer:
"Considering the value the ancient Egyptians placed on enjoying life, it is no surprise that they are known as the first civilization to perfect the art of brewing beer. The Egyptians were so well known as brewers, in fact, that their fame eclipsed the actual inventors of the process, the Sumerians, even in ancient times." Source: Ancient History Encylopedia.
The Festival of Drunkenness goes way back:
"Originally, it was thought these rituals took place later in Egyptian history when they were ruled by the Greeks and Romans. However, recent discoveries from the excavations of the Temple of Mut complex in Luxor show they took place much earlier - around 1470 BCE. ... the Festival of Drunkenness was celebrated by people at least once a year, sometimes twice, in homes, temples and makeshift desert shrines. It was different than many other temple ceremonies as the priests or pharaoh would act on behalf of the people. In this ritual, everyone participated together -- the elites and the peasants. The scene is described in a hymn to Sakhnet as young women with flowing garlands in their hair serving alcohol to everyone They all drink to the point of passing out, then are awoken to the beating of drums and the priests carried out a likeness of the goddess Hathor and they present their petitions to her. It wasn’t just drinking going on either. Graffiti was found discussing 'traveling the marshes', which is a euphemism for having sex. These festivals took place at the beginning of the Nile floods in mid-August, which hearkened to the fertility and renewal of the land by the floods." Source: Naked History (2017).
How can you not like a civilization where everyone took part in a festival like this at least once a year? Drunken orgies have been popular throughout history, of course, but they've gradually lost their religious context. Next video describes William Hogarth's moralistic series of paintings, A Rake's Progress (1733-35). I like to think that the Festival of Drunkenness in ancient Egypt involved scenes like these all over the country.