The NLDATMw. informat does not read some month values correctly. The sample code on the Full Code tab does not read the value Mai correctly.

Operating System and Release Information

options locale=de_DE;

data _null_;
   Maerz=input('01. März 2010 00.00 Uhr',nldatm.);
   Mai=input('01. Mai 2010 00.00 Uhr',nldatm.);
   Oktober=input('01. Oktober 2010 00.00',nldatm.);
   format Maerz Mai Oktober nldatm.;
   put maerz= mai= oktober= ;
run;

The log indicates the month value Mai is considered invalid.

8    options locale=de_DE;
9    data _null_;
10      Maerz=input('01. März 2010 00.00 Uhr',nldatm.);
11      Mai=input('01. Mai 2010 00.00 Uhr',nldatm.);
12      Oktober=input('01. Oktober 2010 00.00',nldatm.);
13      format Maerz Mai Oktober nldatm.;
14      put maerz= mai= oktober= ;
15   run;

NOTE: Invalid argument to function INPUT at line 11 column 8.
Maerz=01. März 2010 00.00 Uhr Mai=. Oktober=01. Oktober 2010 00.00 Uhr
Maerz=01. März 2010 00.00 Uhr Mai=. Oktober=01. Oktober 2010 00.00 Uhr _ERROR_=1 _N_=1
NOTE: Mathematical operations could not be performed at the following places. The results of the
      operations have been set to missing values.
      Each place is given by: (Number of times) at (Line):(Column).
      1 at 11:8
NOTE: DATA statement used (Total process time):
      real time           0.10 seconds
      cpu time            0.03 seconds

A fix for this issue for Base SAS 9.21_M3 is available at: