The dates of death as established after the war by the Department of Justice do not always correspond to the more precise dates which were found thanks to newly uncovered documents (e.g. Sterbebücher from Auschwitz) or more archival research.
Since the first date is, at the moment, still the official day of death, we maintain that date as agreed with the Dutch War Graves Foundation. We are grateful however, that you provided the real day of death in your comment.