Setting a specific time for task

When I click to create a new task, I have to save and close it before I can add a specific time. On desktop there is so much screen space, and the first little pop up to enter in the task is sooo tiny, it could be a little bigger and add more functionality (like selecting date/time).  

The current way is pretty cumbersome, is there a different way to do it? Currently the drag and drop feature isn't working correctly.