minute () gives back the timerange representing the
first or nth Minute of the called object.
Note that minutes normally starts to count at zero,
so ->minute(2) gives the third minute within
the range.
An Minute is in the Calendar perspective as any other
time range not only 60 seconds, but also one
of the (normally) 60 minutes of the Hour , precisely.
minutes () give back an array of all the minutes
containing the time periods called. With arguments,
it will give back a range of those minutes, in the
same enumeration as the n to minute ().
number_of_minutes () simple counts the
number of minutes containing the called time period.
Calendar.Time.TimeofDay()->number_of_hours()