2013: Argentina

Day	Date	Holiday	Comments
Tuesday	January 01	New Years Day
Thursday	January 31	Bicentennial of the Constituent Assembly of 1813	One off holiday
Monday	February 11	Carnival	Celebrated Monday and Tuesday before Ash Wednesday
Tuesday	February 12	Carnival	Celebrated Monday and Tuesday before Ash Wednesday
Wednesday	February 20	Day of the Battle of Salta	One off holiday
Sunday	March 24	Truth and Justice Memorial Day	Dia de la Memoria
Thursday	March 28	Maundy Thursday	International Catholic holiday (optional).The Thursday before Easter Sunday
Friday	March 29	Good Friday	International Catholic holiday
Monday	April 01	Bridge Public Holiday
Tuesday	April 02	Malvinas Day	Veteran' s Day
Wednesday	May 01	Labour Day
Saturday	May 25	May Day Revolution	Anniversary of the First Independent Government in Buenos Aires
Sunday	June 16	Fathers Day	3rd Sunday in June. Not a public holiday.
Thursday	June 20	National Flag Day	Commemorates the death of Manuel Belgrano
Friday	June 21	Bridge Public Holiday
Tuesday	July 09	Independence Day	On May 25 1810 the citizens of Buenos Aires created their First Government Junta
Monday	August 19	St Martins Day	Third Monday in August
Monday	October 14	Day of respect for cultural diversity	Columbus Day
Saturday	October 19	Mothers Day	3rd Sunday in October. Not a public holiday.
Monday	November 25	Day of National Sovereignty	Fourth Monday in November
Sunday	December 08	Immaculate Conception Day	Also known as Virgins Day
Wednesday	December 25	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.