Where in your profile do you see the day that your Marriott silver, gold or platinum level goes back down one notch?

I'm silver, been it for some time but haven't got any hotel stays since one year. So naturally it should go down. I still see silver in my account and will actually be staying a dozen night just over one week from now at a Marriott hotel, but I'm wondering if my account will revert to blue (or whatever the standard level was).

All I see at the top of my account is a message stating that I can buy silver status again for a "special price" (of 7500 Marriott points) if I do so prior to the 31st of March. So is that the final day of my Silver membership?

I gather, that if I do get my dozen nights credited before the membership year is over, I should retain silver as normal plus get the 20% bonus on points?

thanks