A new Rewards member thought I was a Marriott expert and asked me a question. I think I know but wanted to ask the community to be sure. He recently got offered a Gold Challenge and is mapping out stays to try to achieve it. It appears that he needs to make his last stay on 3/31 which is the last day of the challenge. He is concerned that he is checking out on 4/1 and it won't count. I assume it should satisfy it since the stay is in March. But I thought I would check before I lose my status of someone thinking I'm an "expert"