Can be used in switch statements
Time before the epoch is negative
Length is measured as Duration
Beginning is referred to as the epoch (1/1/1970)
Time after the epoch is positive
Good examples would be months of the year, days of the week, etc
Length is described as periods
Consists of units like years, months, day, hours, minutes, seconds
Is considered regular calendar and time
Can be used in formal parameter list of a method
Useful for defining a set of pre-defined, related constants
Is a timeline measured in nanoseconds
Should be in all caps, since they are constants