It seems to me like it takes longer than 24 hours also, but I could just be impatient. I was wondering though, my two villages that have the gong are kept on 1/2 time while I'm concentrating on my second to villages. Does that make a difference? And no, I have never messed with my computers clock. I have been panicking that I'll forget to pause my games this coming weekend and mess everything up due to the change to Daylight Savings Time. :-)