I've posted a new free tutorial on how to quickly create a month calendar for months and years as far back as 45 B.C.!:

On May 26, 2014, alicauchy wrote:
Nice (and easy) algorithm !!

Thanks for sharing.

On May 26, 2014, hcs wrote:
I cite the following sources regarding Durbin's approach in my book "Encyclopedia of Day of Week Calculation":
[1] Martin Eisele: "Kalendertagsberechnung", privates Manuskript, 2005
[2] Michael K. Walters: "An Improved Doomsday Algorithm", Blogspot blog, 2008
http://easydoomsday.blogspot.com/; (25.03.2011)
[3] Robert Goddard: "Learn the First Sunday Doomsday Algorithm", Blogspot blog, 2009
http://firstsundaydoomsday.blogspot.com/; (25.03.2011)
[4] E. Rogent, W. W. Durbin: "How to find the day of the week on which any particular date
falls", The Linking Ring, Vol. 6“; August 1927. Der Artikel liegt mir jedoch nicht vor.
[5] YingKing Yu: "A Perpetual Calendar in Your Head", Blogspot blog, 2010
http://improvedddabyykyu.blogspot.com/2010/09/perpetual-calendar-in-your-head-by-dr.html;
(25.03.2011)
[6] Chamberlain Fong, Michael K. Walters: "Methods for Accelerating Conway's Doomsday
Algorithm (part 2)", Blogspot blog, 2010
http://arxiv.org/ftp/arxiv/papers/1010/1010.0765. pdf (25.03.2011)

See more details here:
http://www.solka2.privat.t-online.de/ebo......1-72.pdf

On May 26, 2014, Scott Cram wrote:
Thanks for the sources, Hans. I might add those to the tips as further reading. I hope you notice I was as careful as possible to give proper credit throughout my post.

On May 26, 2014, Scott Cram wrote:
Is there any chance I can convince you to post about the quick calendar month creation tutorial on http://dayofweekcalculation.blogspot.com ?

On May 28, 2014, vindar wrote:
Very nice tutorial

Thanks Scott !

On May 28, 2014, hcs wrote:
@Scott:
here we go!
http://dayofweekcalculation.blogspot.de/......ial.html

On May 29, 2014, hcs wrote:
I added an addendum for Scotts tutorial:
http://dayofweekcalculation.blogspot.de/......ial.html

In respect to my international readers I'll continue this blog in English. Please correct and submit me errors. I'm looking forward!

I really liked this. Thank you. I think you've done a great job.

I have looked into learning a few methods before but they all involved too much memory work and seemed much slower to calculate. I was up and running with your system in under 15 minutes and able to make the calculation of the day of the week for any given date. feedback from me is that the calendar cards are unnecessary as it can all be done in the head down to a specific date with no need for writing out the whole month as it's really simple to calculate any day/date combo in a month when you already know one. And this was all achievable in performance in under 10 seconds.

Great job Grey Matters, thanks again for sharing.