Award winning book and movies Harry Potter clock 20yrs old today (detail,pics)

The multiple award winning book and movies Harry Potter clock 20yrs old today from the first time when it was first published in 199...
Everyone is familiar with the magic movie and today the author of book who is the first person to be a billionaire in writing books JK Rowling is grateful.
Here are some of her tweets below.
So, how old are you when the book was first published? I knew I'm still a toddler then! What about you?