How old is Jano's sister?

According to the website, Jano's sister is 3 years older than Jano. Jeno's sister was born in 1997, and Jano was born in 2000, so her sister is three years older than him. He once mentioned his sister's age in the live broadcast. Jeno's real name is Jeno, and she was born on April 23rd, 2000. When I was a child, Jeno used to shoot advertisements. She is a quiet sweet bean with a charming smile.