[dunhill]

Hello people, I have a State column where I put if the book was read, I am reading it or if it is next to read.
I would like to have a column that if the state is reading, put the date of the day as the reading start date, and if it was read, put the date as the reading end.
They could guide me. I already have the State column, what syntax should I use in the columns of Start date and end date ????
From already thank you very much.