The MSE User Reputation Leagues for "week" currently shows:
Apr 12, 2015 - Apr 12, 2015
It's not still Sunday (April 12th) for any timezones.
It's been Apr 13th for 6 hours even for UTC-12.
So does the "week" leagues only update and include stats for a full day, not part days?
e.g. at 00:00 UTC it will update and then show "Apr 12 - Apr 13".
Or, if it's updated more regularly, then the page's date range is inaccurate.