RE: Two-digit year

["Kurt D. Zeilenga" <Kurt@OpenLDAP.org>]

The problem with this convention, of course, is that it breaks
in the year 2050.  The syntax and dependent elements are obsolete.
I suggest we delete its specification from the document and
add a note (in the Changes since RFC 2252 section) stating
why it was deleted.

Kurt

At 03:25 PM 2002-01-30, Steven Legg wrote:

>Kathy,
>
>> The UTC Time syntax has only two digits representing the year.  In
>> anticipation of 2000, a convention for interpretation of 
>> two-digit year
>> values was developed.  It should be referenced in RFC 
>> 2252bis, but where
>> is it specified?  Is LDAP referring to X.500 for this?
>
>This convention is described in the X.520, 4th edition description of
>uTCTimeOrderingMatch. It isn't in the 2nd edition of X.520, which is
>the edition we are referencing for ldapbis.
>
>The solution is to duplicate or paraphrase the text in X.520:4th edition,
>which is:
>
>  "UTC times with year values 50 to 99 shall be taken to represent times
>  that are earlier than UTC times with year values 00 to 49.
>
>  The value of the two-digit year field shall be rationalized into a
>  four-digit year value as follows:
>
>  - if the 2-digit value is 00 through 49 inclusive, the value shall
>  have 2000 added to it; and
>
>  - if the 2-digit value is 50 through 99 inclusive, the value shall
>  have 1900 added to it."
>
>Regards,
>Steven