I saw an advertisement that Hilton was matching Marriott status and other hotels. So I submitted my info and within 48 hours I was a Hilton Honors Diamond. Status is valid for 90 days and if I make 9 stays in the next 90 days, I will stay Diamond until March 2020!! I did have to submit my Marriott rewards # and also proof of a recent stay. Extremely easy!
on September 2, 2018