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14:  THE TIME MENU                        

   The "Time Menu" in the Settings menu opens a dialog box  which
provides many ways to set the time. You can also open this box by
clicking on the time shown in the legend. When you open this dialog,
you will see something like the following.  (The exact values depend on
what your computer's built-in clock said when you started Guide).

++  +  ++++ ++ ++ ++
 8 Aug 1985 12:03:31
--  -  ---- -- -- --
Su Mo Tu We Th Fr Sa
28 29 30 31  1  2  3
 4  5  6  7  8  9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
 1  2  3  4  5  6  7
   Time Zone  UTC   
  JD 2446282.21078  
     Time Format    
    Current Time    
 Jan  Feb  Mar  Apr 
 May  Jun  Jul  Aug 
 Sep  Oct  Nov  Dec 
  OK        Cancel  

   Right at the top is Guide's idea of what the time is. By clicking
on a button above a figure,  you can increment it;  for example,
each time you click above the '9' in 1985, you will go forward by a
century.  By clicking on a button below a digit,  you can decrement
it. If you only want to change a few figures a small amount and don't
want to reach for the keyboard,  this can be very convenient.  (You
can also click on the digits in the date/time shown in the Legend,
without even needing to go to the Time dialog.  Guide's title bar
will change as the mouse goes over the digits,  telling you what
a mouse click on that digit will do.)

   If you click on the year,  hour,  minute and second fields on the
second line you can just enter those values from the keyboard.  This
would, for example, be the fastest way to go from 1985 to -333.

   When you enter an hour,  you can also reset the minutes by entering
something like "3:14";  or you can reset the hours, minutes and
seconds with something like "3:14:16".

   Historians and astronomers differ in how they write years before 1
AD.  Historians do not use a year zero.  To them,  the year before 1 AD
is 1 BC.  Astronomers say that the year before 1 AD is 0,  and the year
before that, -1.  This causes a one-year difference:  if astronomers
say an eclipse occurred on 28 Aug -1203,  historians say it happened

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