Based on this question about a site launch which happened at almost exactly this time last year, the private beta of Drones.SE went live two Tuesdays after the proposal reached 100% commitment.
Apparently this is normally the way it works (private beta goes live on a Tuesday or Wednesday during business hours in the USA, and after 1-2 weeks, or sometimes 3 weeks in rare cases).
When would Cardano be scheduled to go live?
I understand that an email is usually sent out to all committers (and I am one!) when the private beta goes live, but it's also sometimes nice to be able to know a bit more in advance when to be prepared for the site going live!