How about the seventh birthday of the seventh lunar month?

"It's great to be born on July 7th. People born on the seventh day of July usually have multiple personalities, complicated emotions, fluctuating thoughts, and sometimes even temporary changes. The woman born on this day is conservative and simple, but she also has a deep sense of happiness and good health, which belongs to the fate of longevity and health. So people born on July 7th can live a healthy life.