Today (Saturday February 28, 2015) is the last day to use your Hyatt Gold Passport Diamond upgrade certs for future reservations.
Also, Fairmont certificates are expiring today, but the customer service is always willing to extend them by couple of months by just calling them.
Remember that with the Hyatt you can apply your expiring suite upgrade certs to future reservations. They don’t have to be used by today but rather merely applied to.
I called last night and had my Fairmont certificates extended by a month. I can use them in Abu Dhabi and/or Dubai in early March.
My four Hyatt Diamond suite upgrade certs will turn to dust tonight. I would much prefer space available upgrades to suites at the time of checking in just like SPG does, although I do understand why many prefer Hyatt’s method.