For anyone interested, I just called and a friendly CSR instructed me that the new challenge will start midnight CST June 1st. He said you can call in and ask to be enrolled. Not sure of all the details (i.e. later Diamond expiration date) b/c he didn't have the details in front of him. However he said the code will be active come tomorrow. He was very knowledgeable about too. said he couldn't tell me out right but since I specifically asked about the challenge, he could provide details. I'll be calling back to see if I can change to the new one if it goes through Feb 2017! (Not hopeful that it will work but definitely going to try my hardest!)