Holiday Calculator  Holiday Calculator

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Many holidays and celebrations occur at the same fixed date each year. Others occur always occur on some special day of the week, or move around wildly, like Easter which is based on the phases of the moon. Others like the equinoxes are based on astronomy. Some events, like presidential inaugurations, don’t happen every year. Some, have moved around over the years. I have posted code to calculate to following holidays given the year.
January February March April May June
New Year’ Day Groundhog Day Commonwealth Day April Fools’ Day Cinco De Mayo Australian Queen’s Birthday
Congress Session Start Day Mardi Gras St Patricks Day Earth Day Europe Day Father’s Day
Martin Luther King Day Ash Wednesday Vernal Equinox Easter Sunday Mother’s Day Summer Solstice
Inauguration Day Lincoln’s Birthday Palm Sunday Easter Monday Armed Forces Day St Jean Baptiste Day
Robbie Burns Day Valentines Day Good Friday ANZAC Day Victoria Day Aboriginal Day
Australia Day Presidents’ Day Memorial Day
Alberta Family Day
Washington’s Birthday
July August September October November December
Canada Day Canada Civic Day Labour Day Canadian Thanksgiving General Election Day HumanRights Day
Independence Day Labor Day Columbus Day Remembrance Day Winter Solstice
Parents Day Grandparents Day Halloween Veterans Day Christmas Eve
Autumnal Equinox American Thanksgiving Christmas
St. Andrews Day Boxing Day
New Years Eve
You will note these are not all holy-days or holidays you get off work. They are not necessarily even celebrations I use the term holiday very broadly to include any regularly recurring special day on the calendar.

The holiday I plan to add next is Chinese New Year which has a complex formula.

This Applet below will show you when all the holidays occur in any given year, BC or AD. If the holiday was not celebrated in that year, it will not appear. It will also show you the nearest weekday to any given holiday.

Please report any errors via email. If you are willing to provide the rules for calculating your favourite holidays, I will add them too.

The program is also available with Java source to download and run it either as an Applet or an application.

If, holidays, the above Holiday Calculator Java Applet (that can also be run as an application) does not work…

  1. This Java Applet (that can also be run as an application) needs Java 1.5 or later, best version 1.5.0_16 or later, version 1.6.0_10 recommended and a recent browser.
  2. You should see the Applet hybrid above looking much like the screenshot. If you don’t, the following should help you get it working:
  3. If you are using Microsoft Internet Explorer, try another browser. Seriously. Microsoft has taken great pains, over and over, to screw up Java and every other multi-platform standardisation.
  4. If you are using Internet Explorer 7 or 8, you must allow blocked content permission for Active X to run. This also gives permission to Java to run. Click the Information bar, and then click Allow blocked content. Unfortunately, this also allows dangerous ActiveX code to run. However, you must do this in order to get access to perfectly-safe Java Applets running in a sandbox. This is part of Microsoft’s war on Java. Don’t put up with it! Use a different browser.
  5. Especially if this Applet hybrid has worked before, try clearing the browser cache and rebooting.
  6. To ensure your Java is up to date, check with Wassup. First, download it and run it as an application independent of your browser, then run it online as an Applet to add the complication of your browser.
  7. If the above Applet hybrid does not work, check the Java console for error messages.
  8. If the above Applet hybrid does not work, you might have better luck with the downloadable version.
  9. If you still can’t get the program working click HELP for more detail.
  10. If you can’t get the above Applet hybrid working after trying the advice above and from the HELP button below, have bugs to report or ideas to improve the program or its documentation, please send me an email atemail Roedy Green.
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PackageVersionReleasedLicenceLanguageNotes 
holidays
Holiday Calculator		 4.1 2008-11-01 free Java
summary / PAD description / screenshot for the current version of Holiday Calculator. Calculates when various holidays occur in any given year BC or AD. Designed to be cannibalised to include the calculation routines in your own programs. Also calculates the nearest weekday to any given holiday.
download Holiday Calculator source and compiled class files to run on your own machine as an application or Applet. First install the most recent Java. To install, extract the zip download with WinZip, (or similar unzip utility) into any directory you please, often J:\ — ticking off the “user folder names” option. To run as an application,type:
java -jar J:\com\mindprod\holidays\holidays.jar
adjusting as necessary to account for where the jar file is.
download ASP PAD XML program description for the current version of Holiday Calculator.
Holiday Calculator is free. Full source included. You may even include the source code, modified or unmodified in commercial programs that you write and distribute. Non-military use only.
    
 
J.R. Stockton’s Holiday Page
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