Earlier quoted context omitted.
What will happen 17th?
according to various models the infection rate should shift from exponential growth to an s-curve function where growth rapidly falls off, the first stage of containment, somewhere around the 15th. the 17th is the monday after that, so many schools and business and cities are planning for everyone to just stay home until the 17th (at least).
When you see the new daily infection rate drop to 10% or less then that's a pretty good signal that we're reaching the top of the S-curve and nearing containment.
The big question is if that will happen before healthcare and quarantine capacity is exceeded.