We previously believed that the Scourge Invasion would start 168 hours after the Zombie Plague. That’s why we used the dates we used in our posts about these events . Nonetheless, a trigger for this next set of conditions fired off at 72 hours, which was earlier today for all realms in this region.
If you don’t believe they’re just following the original code, good for you.
Edit: I was right. Wrath of the Lich King Classic Pre-Patch Event Issues