Minute
Minute is a mapping format to apply to time values.
It returns the minute of the hour as 0, 1, 2 etc.
One interesting use of this mapping format was in a factory, where it was required that a particular envirnomental test was carried out every hour. The minutes were plotted to see how near to the hour the test was done.
The mapping format, Hour, was also used and it gave a quick visual check, that all tests had actually been performed.