Noblegarden date change?

From Blizzard's World of Warcraft News page:

Events Calendar
Check out our new Events Calendar for World of Warcraft!
This calendar provides you with the exact dates for the many different events that take place throughout the year in World of Warcraft. Now you can see when each event begins and ends, so you'll never miss out on the fun! Also, whenever a new event is introduced to World of Warcraft, the calendar and our In-Game Events page will be updated with the latest information about the new addition to the game, so make sure to check back often!

Interestingly, this page says Noblegarden will run from April 16 - May 20.

But previously I posted on the fact that the In Game Events page says (and still does as I write this) March 22 - April 25.

My guess is that the one on the new calendar page is the better to estimate with since the nearby calendar specifically says 2006. The date on the In Game Events page may just be a leftover from last year.