I have purchased 3 rewards (buffet at mirage, buffet at bellagio, breakfast at MGM) I've planned to use them on different days so I was wondering, do I redeem the reward the day of? Or can I redeem the rewards all at once when I visit the MLife desk? I read somewhere that rewards expires 24 hours after it is redeem on the MLife Card? I can't find where I read that, if someone can confirm, that would be great! Thanks!