Sadly, there's not likely to be a "good day" to announce anything in the next 3-4 weeks. Numbers are going to get worse before they get better. They're going to reach a point where they have to just flood the info out there, good timing or not. If their marketing team thinks they're going to wait a few days and happy news will abound, it's remarkably naive. A few days for the edge to wear off of the CDC announcement (and their likely impending matching of WDW rules), sure. But it won't necessarily be "better" next week, or the week after.