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. You might use it to prepare paper calenders well in
advance or electronic calendars. You might also use the logic in computer
programs that compute payrolls, bus schedules, or club meetings. You
might use it in writing novels or researching historical events. It can
also be used as an Applet or a standalone application.

It currently calculates 69 “holidays” including the following:

New Years Day
Congress Start Day
Martin Luther King Day
Inauguration Day
Robbie Burns Day
Australia Day
Groundhog Day
Sweater Day
BC Family Day
Mardi Gras
Ash Wednesday
Darwin Day
Lincoln’s Birthday
Valentines Day
Presidents Day
Alberta Family Day
Washington’s Birthday
Commonwealth Day
Daylight Savings Day
St Patrick’s day
Vernal Equinox
Palm Sunday
Good Friday
Earth Hour
April Fools Day
Earth Day
Easter Sunday
Easter Monday
ANZAC Day
Cinco de Mayo
Europe Day
Mothers Day
Armed Forces Day
Victoria Day
Memorial Day
Change Your Password Day
Australia Queen’s Birthday
Fathers Day
Summer Solstice
Aboriginal Day
St Jean-Baptiste Day
Canada Day
Independence Day
Utah Pioneer Day
Parents’ Day
Canada Civic Day
Canadian Labour Day
American Labor Day
Grandparents Daay
Autumnal Equinox
Canadian Thanksgiving
Columbus Day
Creationism Day
Halloween
Daylight Savings End
General Election Day
Remembrance Day
Veterans Day
American Thanksgiving
Black Friday
St. Andrews Day
World AIDS Day
Human Rights Day
Winter Solstice
Christmas Eve
Christmas
Christmas in the USA
Boxing Day
New Years Eve