I just earned Marriott Platinum status for and it was pretty cool to automatically see it reflected on my SPG status too. The email I received from SPG said that my SPG Platinum status would expire in Feb 28th 2018. I was under the impression that it would last through to Feb 2019.
Forgetting SPG since it's earned via my Marriott link, when would my Marriott Platinum Status expire? And if it is Feb 2019, would I be able to update my SPG status in Mar 2018 again?