Originally Posted by
mwk190
..."If you wish to cancel, please do so 24 hours prior to arrival to avoid cancellation penalties."
...
A literalist would say you can cancel anytime since you don't plan to arrive at all!
I would hope their conformation will be much more specific. To be safe, I'd say 12:01am property time the day before would be the best choice. Hotels are good at writing terms to their advantage, and some don't even follow what they write!