Christmas in Argentina is certainly not a "White Christmas" as the weather is warm, and folks are able to have long celebrations outside without worry of inclement weather.
Like many South American, Central American, and Caribbean countries, many of its citizens have a Catholic background, which results in the birth of Jesus being recognized and Christmas being celebrated.
Many Argentinean people participate in many traditions that are also in the United States. Traditions such as Advent, Christmas Trees (mostly artificial and in different Christmas Colors), Christmas Light Decorations, Santa Claus, and Nativity scenes are just to name a few.
The Celebration of Christmas
Most celebrations take place on Christmas Eve, with a Midnight Mass for Catholics and many other festivities!
The primary meal of Christmas is also ate on Christmas Eve.
The main meal of Christmas is eaten during the evening of Christmas Eve, often about 10 pm or 11 pm. It might be served in the garden or be a barbecue! Some popular dishes include roasted turkey, roasted pork (in northern Argentina, some people will have goat), 'vitel toné' (slices of veal served with a creamy anchovy and tuna sauce), stuffed tomatoes, salads, and lots of different sandwiches like 'pan de atun' (special tuna sandwiches), 'sandwiches de miga' (sandwiches made of thin white bread without the crusts - they can be single, double or multi-layered!) and 'torre de panqueques' (a sandwich 'cake' made from several layers of tortillas with different fillings).
Dessert can be Christmas bread and puddings like 'Pan Dulce' and Panetone, as well as fruit salad, ice cream, and different sorts of pies. There will also be sweets like chocolate raisins, sugar-coated peanuts or almonds, 'mantecol' (a semi-soft nougat made from peanut butter), and different kinds of 'turron' (hard nougat). (Why Christmas)
At the stroke of midnight, Fireworks can be heard all around the country as folks celebrate the beginning of Christmas Day!
Paper decorations with a light inside them called 'globos' are released into the air and float in the sky. This occurs after the fireworks and the lights fill the sky and are a beautiful site.
Children are asleep and hoping for a visit from Papa Noel (Santa Claus) or El Niño Diós (Baby Jesus) to populate their Christmas Tree and Stockings with presents.
While many children receive and open their gifts at Christmas, some will wait until Epiphany on January 6th to see if the Three Wise Men will bring them gifts as well.
Conclusion
Unlike many other countries, Argentina's Christmas celebrations are primarily on Christmas Eve, with many of the adults sleeping for much of Christmas Day.
It seems similar to New Year's Eve celebrations, where people stay up until midnight to bring in the New Year.
Due to their Catholic population, the Christmas Season tends to have many similarities to other countries that share the same faith.