Calendar display missing arrows

Using the Lightning Design theme, the arrows on the calendar date picker don’t show up unless you hover over them:

Default:

Hovering:

Thanks Joe - we’ll get it fixed. 

I’ve also found that with the classic mobile theme the calendar popup background is transparent (although that was pre 7.12… I haven’t checked it since).

Thanks for letting us know about this Joe! It’s been fixed now, thanks in part to you. Also, the fonts on datepickers should look nicer now.

I don’t believe we have a calendar component for mobile, perhaps you’re referring to something else?