For current Gold Elite Marriott Bonvoy members. You will need to call your local Marriott Bonvoy and ask for the Platinum Elite challenge which is to stay a total of 16 nights in the next 90 days. TIP: They tell you it's a 90 day challenge but if you call on the 2nd of the month and ask for the challenge you will get until the end of the month and an additional 90 days to complete the challenge