Always glad to help! The goals always start at the same time and since the company is based in California, I usually list their time zone first when discussing goals:
15 Day Goal = 12 pm PST / 3 pm EST
5 Day Goal = 530pm PST / 830pm EST
Here's a link to the speculated goal calendar which not only lists the days goals are likely to start but there's a note included about the start times as well:
https://forums.storm8.com/showthread...=1#post1604408