Today is the Mid-Autumn festival. The festival is held on the 15th day of the eighth month in the Chinese calendar, during a full moon, which is in September or early October in the Gregorian calendar, close to the autumnal equinox. If you don't know, this is a popular harvest festival celebrated by Chinese and Vietnamese people.
Star Racer: How didja knew I liked the Chinese costumes?! Luna: I didn't knew it! I just wanted to celebrate it! Since it has a moon on this! Star Racer: HAHA! That's why I love you Luna! You make me Happy!