WORLD TIME   By P.E.Marshall.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This program displays the time in selected parts of the world, and shows
which parts are in daylight and which are in darkness.

When ticked, the 'step' feature allows the display to increment in steps
of minutes or days so that the passage of the sun can be observed.

Corrections for daylight saving time will be made automatically, but
assumptions have been made as to the dates clocks are put forward and 
back. There may therefore be errors for a week around clock change time,
but should be correct for 1994 and 1995. 

United States DST is taken from the first Sunday in April to the last
Sunday in October.

European Summer Time is taken from the last Sunday in March to the last 
Sunday in September. 

British Summer Time is taken from the last Sunday in March to the Sunday
after the forth Saturday in October (not the same as the 4th Sunday - see
1995!).

Note however, the change takes place at 00:00 UTC rather than the
usual 1 or 2 AM.


The original version of this program (BAU July 1993) was written for
RISC OS2. The implementation of territories in OS3 prevented the program
from working correctly because most Time/Date convertions produced a
result corrected to local time, which the program already took into
account.

Two versions of the program are now supplied as OS2 and OS3 convert dates
and times differently. The correct program will be selected automatically
at start-up. 



RISC OS-2 version 1.31 January 1994.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Time Zone set-up has been simplified in this version. The computer clock
is assumed to be set to LOCAL time. An option on the program menu 'Local
Offset' should be set to the difference between your local time and UTC.
For the UK this will be 0 in winter and 1 during British Summer Time. 



RISC OS-3 version 1.41 January 1994.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The computer real time clock should be set to UTC with the BST flag set
if appropriate. The alarm clock "Set clock..." feature is the easiest
way to do this. The TimeZone must also be configured correctly for where
you live (0 for the UK).


p.m. 6/10/93