Thank you for contacting Marriott Rewards.
The Platinum Elite challenge was extended as an exception to you on May 4, 2009.
"We would be happy to extend to you our Elite Renewal Challenge to obtain the Platinum Elite status early. The Platinum Elite level requires 75 nights per year. This means that Platinum level members stay an average of 18 nights every three months. If you stay 18 nights within the next three months, your account will be upgraded to the Platinum Elite status."
As noted above, you would need to stay the 18 nights over three months beginning on May 4, 2009. As an exception, I would be happy to include the three Elite nights earned for your stay on April 30 - May 30, 2009. This means eight Elite nights have been credited towards your challenge offer, and you will need to stay 10 more nights by August 4, 2009 to qualify for this upgrade exception.
Please feel free to reply with any additional questions or concerns.
Thank you for your understanding in this matter.