4 days 4 hours
There are 24 hours in a day so 10 days is 240 hours. 243 hours is 10 days and 3 hours.
technically, the day does have 12 hours, not counting the night which (if your horrible at math) adds up to 24 hours.
Yes, about half of the Mcdonalds are open 24 hours a day but ones in small towns and cities are not open 24 hours a day.