192 lines
5.8 KiB
HTML
Executable File
192 lines
5.8 KiB
HTML
Executable File
<HTML>
|
|
<!-- $Id$ -->
|
|
<HEAD>
|
|
<TITLE>Time zone information (TZUTC).</TITLE>
|
|
</HEAD>
|
|
|
|
<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
|
|
<BODY
|
|
BGCOLOR="#FFFFFF"
|
|
TEXT="#000000"
|
|
LINK="#0000FF"
|
|
VLINK="#000080"
|
|
ALINK="#FF0000"
|
|
>
|
|
<PRE>
|
|
**********************************************************************
|
|
FTSC FIDONET TECHNICAL STANDARDS COMMITTEE
|
|
**********************************************************************
|
|
|
|
Publication: FTS-4008
|
|
Revision: 2
|
|
Title: Time zone information (TZUTC)
|
|
Author: FTSC
|
|
Issue Date: 16 May 2003
|
|
Review Date: 16 May 2005
|
|
Obsoletes: FTS-0010.001
|
|
----------------------------------------------------------------------
|
|
Contents:
|
|
1. Introduction
|
|
2. Scope
|
|
3. Current practice
|
|
4. Control paragraph specification
|
|
5. Time zone table
|
|
6. Examples
|
|
A. References
|
|
B. History
|
|
----------------------------------------------------------------------
|
|
|
|
|
|
Status of this document
|
|
-----------------------
|
|
|
|
This document is a Fidonet Technical Standard (FTS), issued by the
|
|
FTSC for the benefit of the Fidonet community.
|
|
|
|
This document is based on the FSP-1001 proposal by Odinn Sorensen,
|
|
2:236/77.
|
|
|
|
This document is released to the public domain, and may be used,
|
|
copied or modified for any purpose whatsoever.
|
|
|
|
|
|
1. Introduction
|
|
---------------
|
|
|
|
Current practice in FidoNet is to transmit message times in local
|
|
time. This document specifies a standard for transmission of time
|
|
zone information in FidoNet messages, in the form of a control
|
|
paragraph (also known as a "control line" or "kludge") named TZUTC.
|
|
|
|
|
|
2. Scope
|
|
--------
|
|
|
|
This standard is specified for the transmission of FidoNet messages
|
|
in any form where time zone information is not integrated into the
|
|
transport format, specifically any form where the information would
|
|
be lost if not transmitted in a control paragraph, eg. Type 2 packed
|
|
messages. [1]
|
|
|
|
|
|
3. Current practice
|
|
-------------------
|
|
|
|
Some control paragraphs already exist to specify the time zone of
|
|
messages, notably "TZUTC" and "TZUTCINFO". From observations of
|
|
these control paragraphs in actual messages, TZUTC and TZUTCINFO are
|
|
identical except for the name. TZUTCINFO is probably named after
|
|
the JAM message base's [2] subfield of the same name.
|
|
|
|
This document adopts the TZUTC control paragraph because is the
|
|
shortest ("TZUTC" vs "TZUTCINFO"). However, software
|
|
implementations should be prepared to read and interpret the
|
|
TZUTCINFO control paragraph as well.
|
|
|
|
The TZUTC control paragraph is inserted before the message body
|
|
upon initial message creation, or export from a format containing
|
|
time zone information, such as the aforementioned JAM message base.
|
|
|
|
|
|
4. Control paragraph specification
|
|
-----------------------------
|
|
|
|
Messages which conform to this specification must add the following
|
|
control paragraph:
|
|
|
|
^aTZUTC: <current offset from UTC>
|
|
|
|
Where ^a is ASCII 1, 01h.
|
|
|
|
The offset has the format <[-]hhmm>, where hhmm is the number of
|
|
hours and minutes, zero-padded to two digits each, that local time
|
|
is offset from UTC. If local time is WEST of UTC, then the offset
|
|
is NEGATIVE. See the table below for typical offsets.
|
|
|
|
Note that the hh in a time zone offset is not limited to a maximum
|
|
of 12. This is because the International Date Line does not run
|
|
exactly along the boundary between zone -1200 and +1200. The
|
|
minutes part is 00 for most time zones.
|
|
|
|
All four digits must be present. If the offset is negative, there
|
|
must be a minus ('-', ASCII 45, 2Dh) in front of the offset.
|
|
|
|
Implementations must NOT put a plus ('+', ASCII 43, 2Bh) in front of
|
|
the offset for positive numbers, but robust implementations should
|
|
be prepared to find (and ignore) a plus if it exists.
|
|
|
|
If local time changes as a result of, for example, daylight savings
|
|
time, then the offset in the TZUTC control paragraph should change
|
|
to reflect this.
|
|
|
|
|
|
5. Time zone table
|
|
------------------
|
|
|
|
This table gives examples of typical time zones.
|
|
|
|
-1000 Alaska-Hawaii Standard Time (United States)
|
|
-0900 Hawaii Daylight Time
|
|
-0800 Pacific Standard Time
|
|
-0700 Pacific Daylight Time
|
|
-0700 Mountain Standard Time
|
|
-0600 Mountain Daylight Time
|
|
-0600 Central Standard Time
|
|
-0500 Central Daylight Time
|
|
-0500 Eastern Standard Time
|
|
-0400 Eastern Daylight Time
|
|
-0400 Atlantic Standard Time
|
|
-0330 Newfoundland Standard Time
|
|
-0300 Atlantic Daylight Time
|
|
-0100 West Africa Time
|
|
0000 Universal Time Coordinated (UTC)
|
|
0000 Greenwich Mean Time
|
|
0100 Central European Time
|
|
0100 British Summer Time
|
|
0200 Central European Summer Time
|
|
0200 Eastern European Time
|
|
0800 Australian Western Standard Time
|
|
0800 China Coast Time
|
|
0900 Japan Standard Time
|
|
0900 Australian Western Daylight Time
|
|
0930 Australian Central Standard Time
|
|
1000 Australian Eastern Standard Time
|
|
1030 Australian Central Daylight Time
|
|
1100 Australian Eastern Daylight Time
|
|
1200 New Zealand Standard Time
|
|
1300 New Zealand Daylight Time
|
|
|
|
|
|
6. Examples
|
|
-----------
|
|
|
|
^aTZUTC: 0000
|
|
^aTZUTC: 0200
|
|
^aTZUTC: -0700
|
|
|
|
|
|
A. References
|
|
-------------
|
|
|
|
[1] "A Basic FidoNet(r) Technical Standard Revision 16", Randy Bush.
|
|
September 1995.
|
|
|
|
[2] "The JAM message base proposal", Joaquim Homrighausen, Andrew
|
|
Milner, Mats Birch and Mats Wallin. July 1993.
|
|
|
|
|
|
B. History
|
|
----------
|
|
|
|
Rev.1, 20030409: First release (revised from FSP-1001 by FTSC)
|
|
Rev.2, 20030516: Corrected status; clarified Section 2 on insertion
|
|
position and export practice; fixed terminology.
|
|
|
|
**********************************************************************
|
|
</PRE>
|
|
|
|
<A HREF="index.htm"><IMG SRC="../images/b_arrow.gif" ALT="Back" Border="0">Go Back</A>
|
|
|
|
</BODY>
|
|
</HTML>
|