Enum representing a unit of time.
Days.
Days = 5
Hours.
Hours = 4
Milliseconds.
Milliseconds = 1
Minutes.
Minutes = 3
Months.
Months = 7
Seconds.
Seconds = 2
Ticks are ten millionths of seconds.
Ticks = 0
Weeks.
Weeks = 6
Years.
Years = 8