Thanks for reminding me of that! I also didn't have any option to change the date. I wasn't looking for that today so I didn't think of it. But you're right, usually you had a fair amount of dates that you could change to (maybe +3 days?).

Since I'm a lowly Platinum now and had no advanced upgrade (and no chance of one) I have no idea if PZ would have been preserved during the rebooking process for IAH-DC flight. I do know I was rebooked into my same fare class on the rebooking and not "Y" (but I think "Y" on rebooking during IROPS went away a long time ago).

-RM