This  program for  the Psion  Organizer II,  Model LZ,  has been
written  by Helmut  Heller after  an idea  of a  similar program
published  by PSION  for  the  series3 organizers.  However,  it
uses  a different  (and  better,  since  it does  not  have  any
restrictions on the year) algorithm (after Oudin) to compute the
date of easter. All the coding was done from scratch. 

When  you start  it, it  first asks  for the  year (the  current
year  is the  default), then  you  have to  enter  a two  letter
abbreviation  of your state (BY is  Bavaria, etc.), and you have
to  tell if you are  working in the  public sector (ðffentlicher
Dienst). Then a new file in diary-format is generated. 

To  actually run the program you have to  have a lot of space on
your  A: drive. But since you  only need to run  it once a year,
I think this is not too much of a restriction.


The holidays are stored in a file called german.odb. The format 
is as follows:
string:	name of holiday
int:	day of holiday within month (1...31)
int:	month of year (1..12)
string:	Bundesland (dot separated 2 char abbreviations of 
	BundeslÙnder where the holiday is  valid)
int:	type of holiday 


The day field can have a special meaning:
1...31: Normal day within month
0:	Date is relative to easter
99:	Date is relative to 1 Advent
107:	Erntedankfest (German thanksgiving)
207:	Muttertag (mother's day)
407:	End of summertime
907:	Beginning of summertime


For the computation of easter (not trivial!) one can find a very
good collection on the net at:
http://cssa.stanford.edu/~marcos/ec-cal.html by Marcos Montes.

The  1. Advent  is  4 weeks  before  xmas,  unless the  24th  is
itself a sunday, then only three weeks.

Mother's  day is the second sunday in May (at least in Germany).

Erntedankfest is the first sunday in October.

Start of summer time is the last sunday in March. 
Stop of summer time is the last sunday in October. 


If  the day field  is 0  or 99  then the  month field  gives the
offset  (+ or -)  in days.  If it is  another special  flag, the
month is ignored. 

The type field can be:
F:	real holiday
f:	holiday only in certain states of Germany
X:	summertime on/off
O:	easter sunday
Fo:	holiday for employees in the public sector
fo:	afternoon free for employees in the public sector


In   addition  to  the  main  procedure  hol.opl  we  also  need
int$.opl and month.opl, and of course the data base german.obd.

The  programs are pretty  self explanatory.  Please use  them at
your leisure, but retain the

Copyright by Helmut Heller

Redistribute  as you wish as  long as this  file accompanies the
distribution. Any suggestions or additions you might have please
send  to: heller@altoetting-online.de Also  look at my  web page
at: http://www.lrz.de/~heller 


I am including a few ready-to-merge data files called h1997.odb,
h1998.odb,   etc.  Merge  them  into  your  diary  to  have  the
holidays programmed.