Andem - 1:25 am on Mar 28, 2013 (gmt 0)
Interesting. I'm not seeing the same as you, murgatroid. When I play around with dates, sometimes previous periods (-2 weeks), some days display 0. IE. Mar 12 - Mar 28, Mar 12 - 14 display zero.
It appears that a programmer at Google may have made a commit while tired and then just left for the night.