Ginny is the youngest child of Arthur and Molly Weasley, the first girl born in seven generations (JKR).
Ginevra "Ginny" Molly Weasley is born to Arthur and Molly Weasley.
Ginny Weasley is born
Date August 11th, 1981
Certainty Stated in canon
Location in Canon JKR (website)
Type of Event Wizarding world