GS1 Australia User Manual - Numbering and Bar Coding

GS1 Application Identifiers (AIs)
Date/Time Identification
The following AIs identify different types of dates. When used on non-retail trade items, the dates refer to the trade items
contained inside the non-retail trade items.
• AI (11) - Production date; see page 96
• AI (12) - Due date; see page 96
• AI (13) - Packaging date; see page 97
• AI (15) - Best before date; see page 97
• AI (17) - Expiration date; see page 98
• AI (7003) - Expiration Date and Time; see page 125
• AI (8008) - Date and time of production; see page 134
The standard length of a date is six digits, in the format year, month, day (YYMMDD).
The structure is:
Year:
Month:
Day:
the tens and units of the year (e.g. 2003 = 03), which is mandatory
the number of the month (e.g. January = 01), which is mandatory
the number of the day of the relevant month (e.g. second day = 02);
if it not necessary to specify the day, the field must be filled with two zeros.
Since the data field “year” consists of two positions, the century is established by the following procedure:
Subract current
year from n 1 n 2
Result is 51 to 99 Result is -51 to -99
NO
NO
YES
YES
Year from n 1 n 2 is
previous century
Year n 1 n 2 is
next century
Year n 1 n 2 is
current century
Figure 17 Calculation of Year
January, 2010 GS1 Australia User Manual - Numbering and Bar Coding 81