I have recently noticed, but cannot confirm for how long this exists, that the height of the date selector is dynamic, adjusting according to the number of weeks in any particular month i.e. increasing in height for months with more weeks, and reducing in height for shorter months (depending on which days of the month a new week starts).
Because the height is dynamic, skipping ahead/back becomes irritating because every time the height of the box changes, the user now needs to move the pointer around to hit to the navigation arrows, instead of just being able to hit skip (x) times.
This might seem like a small issue, and I guess it is, but depending on where the date selector happens to be positioned in the viewport, missing the arrow often means clicking something else below, and opening up some other dialogue etc…
Please make the date selector a fixed height.