This API will output in XML or JSON and includes optional days-until pancake day countdown and recipe.
E.G: http://api.isitpancakeday.com/?format=xml&daysuntil&recipe
Pass a date in the format &date=dd-mm-yyyy and you can even check if a future or past date is pancake day.
E.G: http://api.isitpancakeday.com/?format=xml&date=25-12-2113
Awesome huh?
Currently there are no useage restrictions on this important service but here's a hint for advanced application programmers: You'll probably only need to make this API call once per day.