Knowledge Base

XADM: Year 2000 Support for DateTime Properties

Article ID: 163906

Article Last Modified on 10/28/2006

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This article was previously published under Q163906

SUMMARY

The RAW display of the last updated field in the properties of a mailbox is displayed in the format YYMMDD. Although there are only 2 digits for the year, the actual data is valid up to the year 2079. The date and time of this field is year 2000 friendly and satisfies the X500 ITU standards. The X.500 ITU standards recommend that vendors use this format until the year 2010, and then begin transitioning to a longer date format. The transition should be completed no later than the year 2025, a 15-year grace period.

MORE INFORMATION

The Microsoft Exchange Directory stores datetime Raw properties, such as When-Changed and When-Created, in Universal Coordinated Time (UTC) string format, as specified by the X.500 standards. UTC is the same as Greenwich Mean Time (GMT).

The UTC format has only two digits representing the year but they are valid for the years 1980 to 2079. Therefore, this will not be a problem for dates that rollover to the year 2000 or beyond.

The UTC String format uses the following syntax:

YYMMDDhhmmssZ

where

YY = Year
MM = Month
DD = Day
hh = Hour
mm = Minutes
ss = Seconds
Z = Zulu (same as GMT)

For example, a datetime value of 06/03/2000 10:58.20 PM would be represented as follows: 
   000603225820Z
Please note that this value is base on GMT and the hour (hh) may vary according to location and other factors.

Additional query words: year 2000

Keywords: kbinfo KB163906


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