Happy Mid-Autumn Festival! Also known as the Moon Festival or the Mooncake Festival, this traditional celebration is the second most important Chinese festival that's held to give thanks for the season's harvest. Mooncakes are a must-eat pastry during this holiday, as they symbolize prosperity and reunion for families. The cakes are pressed with beautiful designs that have sweet fillings like lotus seed paste or red bean paste, often with salted egg yolks baked in the center. See if you can match the mooncake pairs!