Recently had an API usage scare and found that the very loose "Day of the Week" column left a lot to the imagination about when that actual day starts. There is no documentation I've found that defines this day's start time.
Hunting around, I see that no Date/Time is available on that report, and there is surprisingly little query-able fields in the database that help in granularly isolating API usage problems.
Am I missing something obvious or are API statistics not readily available?