[3] インターネットメールでの初出は RFC 733 で、 それ以前は似たような時間帯を表す文字列 (のみ) を特に注記なく定義しています。
The other remaining
two forms are taken from ANSI standard X3.51-1975. One allows
explicit indication of the amount of offset from GMT; the other
uses common 3-character strings for indicating time zones in
North America.
The other remaining two forms are taken
from ANSI standard X3.51-1975. One allows explicit indication of
the amount of offset from UT; the other uses common 3-character
strings for indicating time zones in North America.
ANSI. "Representations of Universal Time, Local Time Differen-
tials, and United States Time Zone References for Information
Interchange," X3.51-1975. American National Standards Insti-
tute: New York (1975).
Washington D.C., March 1998 - NCITS (National Committee for Information Technology Standards) is announcing the public comment period for ANSI X3.51:1994. The public review extends from April 10, 1998 to June 9, 1998.
The scope of this standard is limited to the interchange of data among systems. This standard was not designed for (nor does it preclude) usage by humans as input to, or output from, data systems.
ANSI X3.51 is being withdrawn as it was incorporated in NCITS 310:1998, Information Technology -Representation of Time for Information Interchange.