On my stats page, statistics for the next day are being tabulated before that day even has come yet. For example today is May 2nd, but my graph shows stats for May 3rd which hasn’t even happened yet. I set my time and date accurately, anyway to fix this?
Stats, and wordpress internally run on UTC/GMT time since people from all over the world use wordpress. The time and date that you set under settings > general will only control your publish dates/times shown on your blog posts and such.
No, but you do get a full 24 hours of stats for each day, it just starts and end at different times than your day, and in the end that actual start and end time mean little really. On my self-hosted blog for example I can see the break down of visitors by country and nearly 50% of my visitors come from countries other than the US where I live.