I have upcoming plans for a few stays at Hyatt properties within a 60 day timeframe. 1 stay will be using my suite upgrade certificate from the Chase Hyatt card. I will be staying 4-5 nights on the first stay. I also have planned on the same trip 3 nights at an Andaz property. There I will have two Free nights and 1 paid night. I have another trip planned where I will have two rooms each for 3 nights, all paid nights. Now for my question. I am a Diamond with Hilton strictly through credit card spend. Can I call Hyatt and ask for a Diamond challenge and do I have enough nights with the above scenario?