Nice work, looks very clean.

Small suggestion for the date picker:

I appreciate that you can click on the month+year to navigate between years much more quickly than using the previous/next month arrows, but it's a bit non-obvious. There should be a hover effect when the cursor is over the month+year, e.g. a gray rounded rectangle, just like a gray circle appears when you're hovering over the arrows or a date. This would make it clearer that this is clickable.