ERG!!! This is not following any standard for week numbers.
Here I was attempting to make everything work with the data grouped by week that starts on a Monday or Sunday. Nope. First day for the year this year, 2015, is Thursday. So the first day of week for every week is Thursday.
You’re right, Pat. This needs to noted, so I added it to the tutorial. I’m guessing you think it should be a tooltip on the Default Date Granularityso that you can find this information without wandering over to the documentation. I’ll make that suggestion.