What is "chilseok"

Chilseok is a Korean traditional festival which falls on the seventh day of the seventh month of the Korean lunisolar calendar, originating from the Chinese Qixi Festival. Chilseok is a period where the heat starts to dwindle and the monsoon season begins, and the rain that falls during this period is called Chilseok water. As pumpkins, cucumbers, and melons start to flourish during this period, people traditionally offered fried pumpkin to the Great Dipper.