So for the last few years, it was always my understanding that say you earn platinum in 2014, you will have platinum until March 31st, 2015, giving you 3 months to re-earn Platinum status. So in 2014, I hit platinum and finished the year with 13,XXX points. My card said I was platinum until March 2015, which is what I expected. I went to Vegas two weeks ago for four nights, earned 4,700 tier credits, but mid-way through my trip, I lost my card and when I got another one, I was now platinum until March 2016. So clearly I'm missing something. I asked the girl at the desk and she gave me an answer but it didn't really make sense. Hopefully someone here can help me understand. This year, with two trips to go and the 50% bonus still to kick in on the 4,700, I am definitely hitting diamond. As far as I understand, I'll keep that Diamond status until March 31, 2016, but still not quite sure. Any help is appreciated!