With this coming weekend being a three-day holiday weekend in the U.S., and with the heavy news week in the U.S. due to a national party convention and a hurricane threat to the central Gulf coast (in the area where Katrina hit seven years ago), my guess is not before this weekend, being the opening weekend of the college (American) football season, and probably on Tuesday of next week after the holiday and when virtually all students will be back home and in class.
I could be wrong too, but, CBS definitely does not want to waste promotion time if no one is paying attention.