> Chronologie (tijdrekenkunde) in de Nederlanden
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Boeken

1988 Jensen
C.R. Jensen, Parish Register Latin: An Introduction,
Salt Lake City (Utah), Vita Nova Books, 1988 (XXII + 427 pp.), pp.259-266 (Appendix C, Fixed and Movable Feast Days)
Raadpleegbaar via internet: https://archive.org/details/parishregisterla00crus

Websites

Calculate the date of Easter & other movable holidays
http://people.albion.edu/imacinnes/calendar//Ecclesiastical_dates.html

Easter Date Calculator (326-4099)
www.gmarts.org/index.php?go=413

Heiligen op naam
www.heiligen.net/heiligen_naam_js.php

Heiligenkalender [heiligen op datum]
www.heiligen.net/kalender.php

S. Kershaw, When is Easter?  To find the date of Easter Day in any year
http://easter.oremus.org/easter/

K. Laughery, The Date of Easter Sunday, A.D. 326 - 4099
www.kevinlaughery.com/east4099.html

Missaalheiligen [heiligen op datum]
www.heiligen.net/missaalhh.php