DIN 1355-1

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Logo of the German Institute for Standardization DIN 1355-1
Area Time calculation
title Time; Calendar, week numbering, current date, time
Latest edition 1975-03 (withdrawn in 1994)
ISO 8601

The DIN standard DIN 1355-1 contained recommendations for the calculation of time , in particular calendar, week numbering , ways of writing the date and time .

The first edition was in January 1943 as DIN 1355 under the title “Time. Time units, days of the week, weeks, months ”appeared. She recommended the abbreviations w and mo for week and month as well as the abbreviation a for the time unit year and also the abbreviations sec., Min., Hour, day, week, month and year for the time units. If it could not be confused with m (meter), min could be replaced by m. The characters h, m and s were to be raised in the case of times. For the months, the abbreviations Jan., Febr., ..., Dec. and the three-letter "Abbreviations for lack of space" Jan, Feb, Mar, ..., Dec written without a period were provided. Weeks started on Sunday midnight and ended on the following Saturday (Saturday) midnight. For week numbering, it was recommended that the week beginning on January 1st or that part of the week be considered the first week; possibly the first week only consisted of January 1st of a year.

The subsequent edition of DIN 1355-1 from March 1975 also dealt with the counting of calendar years and used the spellings AD or AD and BC. Chr. Geb. or v. A. The definition “There is no calendar year 0” was given the exception in a comment: “This does not apply to the field of astronomy”. The 3-letter abbreviations of the first edition were adopted as the “abbreviated names” of the calendar months, the “abbreviations” there with dots were no longer used. The "number of the calendar month": 01, 02, ..., 12. It was also noted that the pronunciation Juno for June and Julei for July was used "to avoid misunderstandings". Instead of the week, this edition featured the “calendar week”, which always had 7 “weekdays” - not “calendar weekdays”. The designation Saturday now took precedence over Saturday. The “number of the weekday” was new, with Monday number 1 and Sunday 7. A specification about the beginning of the week, which was as precise as that of the first edition, was missing for the calendar week. Outside of the standard, it was noted: "In this count, Thursday is not the middle day of the calendar week, but Wednesday". Recommendations about the notation of time units and the time specification with superscript characters were dropped.

This edition was withdrawn in November 1994 with the introduction of EN 28601. The national implementation of DIN EN 28601 had already appeared in February 1993 under the title "Data elements and exchange formats - information exchange - representation of date and time".

At the international level, the ISO had been working on the same topic with its ISO 8601 standard since 1988 . The third - and currently [as of March 2012] current - edition of this international standard dates from December 2004 and was incorporated into the German set of standards in September 2006 as DIN ISO 8601 "Data elements and exchange formats - information exchange - representation of date and time"; previously there was a draft DIN EN ISO 8601 from March 2002.

Individual evidence

  1. ^ Title page of DIN 1355-1: 1975-03