D20A Code List 2151

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