weeks and days x axis labels are confusing.
I find the x axis rather confusing, for a ~ 2 week plot. I think that 8 days in the past it might be trying to say -1w+1d, or something, but the spacing between tick marks is such that it is hard to tell how to parse the tick labels.
It might be better to stick to days until a span where we can do just weekly ticks, say, 28 days then switch to 4 weeks.