When I use the date picker, here is how I imagine it should work:

- Click on start date, type in date and time I want

- Press down arrow to select the suggestion that appears in the dropdown, then enter/return to confirm

- Press tab to move to the due date

- Same thing with down arrow use

Even though it's not a huge deal, just being able to complete date selection without moving from keyboard to mouse/trackpad over and over would make the date picker usability so much better. Thanks!