Gregorian dates are indicated in the guide by the following symbols:
Table 15 Gregorian Date Symbols
Symbol  | 
Description  | 
|---|---|
dd  | 
Day of the month (01 – 31)  | 
mm  | 
Month (01 – 12)  | 
yy  | 
Last two digits of the year  | 
Note: If the last two digits in the specified year are a number less than 56, IOA presumes that the year is in the 21st century (for example, if yy=15, the year 2015 would be presumed). Otherwise, IOA presumes that the year is in the 20th century (for example, if yy=80, the year 1980 would be presumed).  | 
|
yyyy  | 
Four digits of the year  | 
Whether a field holds a 4-character date (month and day), a 6-character date (month, day and 2-digit year) or an 8-character date (month, day and 4-digit year) depends on the field. However, the format of the 4-character, 6-character or 8-character date depends on the installation defined date standard.
INCONTROL products support three date standards for Gregorian dates. Each standard has an 8-character format, a 6-character format and a 4-character format. Only one Gregorian date standard is defined at any site.
These supported Gregorian date standards are described in the chart below.
Table 16 Standard Gregorian Dates
Standard  | 
4-Character Date  | 
6-Character Date  | 
8-Character Date  | 
|---|---|---|---|
MDY  | 
mmdd  | 
mmddyy  | 
mmddyyyy  | 
DMY  | 
ddmm  | 
ddmmyy  | 
ddmmyyyy  | 
YMD  | 
mmdd  | 
yymmdd  | 
yyyymmdd  | 
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