Holidays Holland.com
Dutch national holidays listed.
http://www2.holland.com/global/index.html?page=http://www2.
holland.com/global/geninfo/practinfo/nathol.html

Simply Amsterdam
Index of Dutch public holidays and other red letter days.
http://www.simplyamsterdam.nl/holidays_show.php3

The Netherlands
A guide to public and religious holidays in Holland.
http://www.nrc.nl/W2/Lab/Profiel/Nederland/holidays.html

Trade Port
Includes the details of national holidays in Holland.
http://www.tradeport.org/countries/netherlands/01grw.html