2151 Period type code

Code specifying the type of period.

Type

String (AN)

Length

Min 1 / Max 3

Codes

Code	Description
3M	Quarter A subdivision of a year into four equal parts.
6M	Half-year A subdivision of a year into two equal parts.
AA	Air hour Flight duration irrespective of time zones.
AD	Air day Flight duration irrespective of time zones.
CD	Calendar day (includes weekends and holidays) Period given as a number of days including weekends and holidays.
CW	Calendar week (7day) Period given as a number of 7day-weeks including holidays.
D	Day The twenty-four hour period during which the earth completes one rotation on its axis.
DC	Ten days period Period of 10 days.
F	Period of two weeks A period of time lasting fourteen days. Synonym: Fortnight.
H	Hour One of the twenty-four sub-divisions of a day.
HM	Half month A subdivision of a month into two equal parts.
M	Month One of twelve divisions of the year as determined by the Gregorian calendar.
MN	Minute A unit of time equal to 1/60 of an hour, or 60 seconds.
P	Four month period A period of time, measured in monthly increments, consisting of four sequential months.
S	Second A unit of time equal to 1/60 of a minute.
SD	Surface day The voyage duration irrespective of time zones.
SI	Indefinite An indefinite period.
W	Week Period of seven days.
WD	Workday Day on which work is usually done.
WW	5 day work week Monday through Friday.
Y	Year The period of time as measured by the Gregorian calendar in which the earth completes a single revolution around the sun.
ZZZ	Mutually defined Period as per agreement.

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