Small changes add up faster than most people expect.
The change has been coming for a while, but it only became obvious this year.
What it costs
The exceptions matter more than the rule, and there are three of them. The practical effect is easier to see in a single example than in a summary.
What to check first
There is a deadline involved, and missing it costs more than the difference. Most of the confusion comes from two terms that sound alike and mean different things.
The exceptions
Most of the confusion comes from two terms that sound alike and mean different things. The exceptions matter more than the rule, and there are three of them.
The short answer: check the date, then check the figure, then decide.