If I want to switch from earning miles in one stay to points in the very next stay, when is the right time to do the switch in my profile. The two stays are very close, so I can't wait till the miles post from the first stay.

At Hilton, it was the day you check out. Not sure about Marriott. the day you makes the reservation, the day you checks in, the day you checks out or a random day in between?

Thank you.