Les to clarify things:
Enter your search word in the box next to the word "zoek" for a quick search.
If you want a more specific search click on "uitgebreid zoeken"
It shows:
Beschrijving description
Dag maand jaar day month year
Periode vanaf tot en met periods from until (4 digit years)
Trefwoord entry
And the list goes on.....
Just typing from until 1945 got me 9534 hits on 477 pages
But as you already mentioned all is in Dutch
