Easier to Change Calendar Dates of Tasks.

In Calendar I'd like to be able to slide a task from one date to another. At present you have to click on the cog wheel and change the due date which is slower.  And tasks will move frequently from day to day so it needs to be quick.  In fact I would prefer not to have to put a date at all and the task simply pops up on a "to do" list rather than a calendar.