constants UnitEnum
The UnitEnum type specifies the time units supported. Use the UnitScale property to specify the time scale. Use the Unit property to specify the time unit in the level. The UnitEnum type includes the following time units:

NameValueDescription
exYear0 Indicates the year. Values: ..., 2001, 2002, 2003, ... 
exHalfYear1 A date between January 1st and June 31 indicates the first half of the year, and from July 1 to December 31, indicates the second half of the year. Values: 1 and 2
exQuarterYear2 A date between January 1st and March 31 indicates the first quarter of the year, a date between April 1st and June 30 indicates the second quarter of the year, a date between July 1st and September 30 indicates the third quarter of the year, and if a date between October 1st and December 31 indicates the forth quarter of the year. Values: 1, 2, 3 and 4
exMonth16 Indicates the month. Values: 1 ( January ), 2 ( February ), ..., and 12 ( December ). Use the MonthNames property to specify the name of the months.
exThirdMonth17 The first ten days in a month indicates the first third of the month, the next 10 days indicates the second third of the month, and the last 10 days in the month indicates the last third of the month. Values: 1, 2 and 3.
exWeek256 Indicates the week in the year. Values: 1,2,...,53. Use the WeekDays property to specify the name of the days in the week.
exDay4096 Indicates the day of the date. Values: 1,2,..,31
exHour65536 Indicates the hour.
exMinute1048576 Indicates the minute.
exSecond16777216 Indicates the second.