2011: Argentina

Day	Date	Holiday	Comments
Saturday	January 01	New Years Day
Thursday	March 24	Truth and Justice Memorial Day	Dia de la Memoria
Saturday	April 02	Malvinas Day	Veteran' s Day
Thursday	April 21	Maundy Thursday	International Catholic holiday (optional).The Thursday before Easter Sunday
Friday	April 22	Good Friday	International Catholic holiday
Sunday	May 01	Labour Day
Wednesday	May 25	May Day Revolution	Anniversary of the First Independent Government in Buenos Aires
Sunday	June 19	Fathers Day	3rd Sunday in June. Not a public holiday.
Monday	June 20	National Flag Day	Third Monday in June
Saturday	July 09	Independence Day	On May 25 1810 the citizens of Buenos Aires created their First Government Junta
Monday	August 15	St Martins Day	Third Monday in August
Monday	October 10	Day of respect for cultural diversity	Columbus Day
Tuesday	October 11	Bank and Public Sector Holiday	Centenario de Salazar. Buenos Aires only.
Sunday	October 16	Mothers Day	3rd Sunday in October. Not a public holiday.
Thursday	December 08	Immaculate Conception Day	Also known as Virgins Day
Monday	December 26	Christmas Holiday	In lieu of Christmas Day

National Holiday

Regional Holiday

Not a Public Holiday

If the date falls on a Wednesday, the holiday is the preceding Monday. If it falls on a Thursday then the holiday is the following Monday.
If the holiday is on Tuesday, Monday is added as a holiday day. if the holiday is on Thursday, then Friday is granted as holiday.
The rules above can lead to a lot of annual Public holidays, but most Argentinians only get 10 vacation days, rising to 15 days if they have worked for more than 5 years in a company.