Information Resources and Technology Management


You are invited to read the definitions of terms used in this data standard.

Calendar Year
Four-digit numeric code used to represent the year portion of a calendar date. 
NNNN, where each N represents a number from 0 through 9. 
Recommended Field Name YEAR
YYYY, where each Y represents a number from 0 through 9.
Historical Data For information on past versions of this standard, contact the National Data Administrator, Geospatial and Data Services, Division of Information Resources and Technology Management.

Part 270, FW 6, Data Management and Standards, has been superceded by Part 274, FW 2, Establishing Service Data Standards.

Important Notice:  Effective September 2, 2008, the National Institute of Standards and Technology (NIST) announced in the Federal Register, Volume 73, No. 170 (73FR 51276), that the Secretary of Commerce approved the withdrawal of 10 FIPS Publications  including Federal Information Processing Standards 4-2, Representation of Calendar Date for Information Interchange. These FIPS are being withdrawn because they are obsolete, or have not been updated to adopt current voluntary industry standards, federal specifications, federal data standards, or current good practices for information security. 

FIPS 4-2 adopts American Standard ANSI X3.30-1997:  Representation of Date for Information Interchange (revision of ANSI X3.30-1985 {RI991}), which was superseded by ANSI/INCITS 30-1997, Representation for Calendar Date and Ordinal Date for Information Exchange, InterNational Committee for Information Technology Standards (formerly NCITS), 01 Jan 1998.

Use Instructions
Service staff will utilize this data element in any new or existing systems, data sets, databases, and information applications, including Geographic Information System (GIS) data and applications.
Approval Date
July 13, 1999
Validation Date
November 29, 2013
Data Steward
National Data Administrator, Geospatial Data and Services, Division of Information Resources and Technology Management.


Last updated: March 9, 2018