In celebration of the mid-autumn harvest festival, which is traditionally celebrated in Chinese and Vietnamese cultures on the 15th day of the eighth month of the lunar calendar during the full moon, the Chinese-inspired brewery Lucky Envelope will distribute a variety of free mooncakes in different flavors. They'll also unveil a modified version of their Mijiaya Historic Chinese Beer, which is meant to approximate beer in northern China 5,000 years ago, as well as an autumnal version of their Double Happiness Barrel-Aged Imperial Porter and Lychee Black Tea Hazy IPA.