Hallo Marc, 

 MB> I am searching for a batch file to set the variable acording to the
 MB> Daylight saving time. From the last sunday of march till the last sunday
 MB> of October it should be set as SET TZUTX=+0200 otherwhise it should be
 MB> TZUTC=+0100

Try these lines:

::  XDLT.BTM
::  This line looks for Januar 1st, next year.
    set jan1next=%{at}date[01-01-%{at}eval[%_year + 1]]
::  These lines determine the last sunday in March 
::  (end of wintertime)
    set march31=%{at}eval[%jan1next-276]
    set lsm=%{at}eval[%march31-%{at}dowi[%march31]+1]
::  These lines determine the last sunday in October 
::  (end Of summertime)
    set oct31=%{at}eval[%jan1next-62]
    set lso=%{at}eval[%oct31-%{at}dowi[%oct31]+1]
::  This line sets variable to determine daylight 
::  saving time on or off (Join at the ...)!
    set TZUTX=%{at}if[%{at}date[%_date] ge %lsm .and. ...
...%{at}date[%_date] le %lso,+0200,+0100]

Be careful to rejoin the last long line. Housekeeping (unset unused vars
etc) should be added.

Have fun!


Ostrhauderfehn, 11. Dezember 1998, 8:03:22

*Klaus Meinhard*


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