Quick question ‘cause I’m too lazy to re-watch everything…

…do they ever say Beth has turned 18 on the show? Like, she was 16 when they met her. She died approximately 447 days later. I always hear ppl say she was 18, but she might have still been 17? Unless they said she was 18 of course. Which I’m too lazy to go back and check, which is why I’m asking. lol. Anyone?