What does "seventeen and one year old" mean? Can it be used to express one's own birthday?

"Seventeen and one year old" means: Time flies so fast, eighteen years have passed. It can be used to express your birthday.

The sentences that express my birthday are as follows:

1. What is decadent is the bright red burn marks, the yellowed fingers and the silent heart, which is more like falling in love in a winter. Happy birthday to myself.

2. You can’t miss yourself, take care of your pain, get your results, and give yourself happiness. Happy birthday to myself.

3. Life cannot be a game of life, otherwise nothing will be achieved; life cannot be without games, otherwise it will be monotonous and boring. Happy birthday to myself.

4. When a beast is injured, it can run to a cave to hide, then lick its wounds and persist on its own. But once it's greeted, it can't stand it. Happy birthday to myself.

5. What is happiness? I often ask myself this. When I was a child, I would play games with my friends, and the whole yard would be filled with joyful laughter, and everyone would have a smile on their face. It turns out that happiness is immersed in games. Happy birthday to myself.