I am likely to need to guest two people into several Admirals Clubs next month. I can bring one guest in on my CX MPCGold card so would likely need to buy a 1-day pass for the second person. Our itinerary includes two afternoon admissions, one evening and one early morning admissions. All would occur within 24-hours but the morning one would be the next day. So is the Day Pass based on a date day, or on a 24-hour "day"?

Follow up: Finally found the answer on the AA website. Appears that the pass is good at the first airport following an overnight flight so it would work in the case I'm looking at.