Recommendation No. 7

Numerical Representation of Dates, Time and Periods of Time

Author/Source: UNECE through its Center for Trade Facilitation and Electronic Business (UN/CEFACT)

Year of adopting/publication: 1988 (second version)
Document reference: TRADE/WP.4/INF.108

Link to the document on the internet: Recommendation N.7

Purpose: To recommend that participants in international trade, Governments and international organizations accept and use, and promote the general acceptance of the method set out hereafter of expressing dates, time and periods of time, whenever these data are to be used in international trade.

Summary: This Recommendation establishes a method for a standardized and unambiguous all-numerical designation of a given date, a given time of the day and a given period of time. It applies in all cases where these data are presented as separate entries in numerical form but not when they are part of a plain language text. It has been developed pursuant to standard ISO-8601 “Data elements and interchange for- mats – Information interchange – Representation of dates and times”

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