I've often found myself going to the calendar view, clicking on the due date of a version, and then working out what today is, then manually in my head trying to figure out the number of days left to get a feel if we are going to make it or not.

What if we modified the inline dialog for JIRA versions to include days remaining
Currently looks like this:

What if we did something like this:

Instead?

For JIRA versions, they are always "all day events", so it doesn't make sense to show "All day really, it is not possible for a user to set a date.

Then I was thinking, we could actually do that for both JIRA versions, and JIRA issues. Where we have the time, or day, we also put the days remaining

In the case where it is today it wouldn't say anything