Not that you need any additional incentive to calendar a trial date correctly. But here's some more.
The Court of Appeal holds that a plaintiff isn't entitled to mandatory relief under the "attorney fault" provisions of CCP 473(b) when her lawyer admits that he calendared the wrong trial date and, as a result, didn't show up for -- and hence lost -- the trial. Maybe (to reiterate: maybe) she can seek discretionary relief. Good luck with that. But while Section 473(b) permits you to vacate a default, that rule doesn't apply to not showing up at trial.
That's not a default. We instead call that something else: Losing.
So calendar those dates correctly. They're pretty important, after all.
Or, at a minimum, keep those malpractice insurance premiums paid up.