Your answer depends on the government supporting the science station. Holidays for the Russian base are different from those celebrated by the New Zealand, British or US bases.
There are no countries on Antarctica, so no national holidays are designated for that geography.
Since no one lives there permanently, it is unlikely that many holidays at all are observed there.
Antarctica -- like every other continent -- does not per se, decorate for the holidays.People who live and work there temporarily may decorate to their own personal taste for holidays they choose to celebrate.
Tourism is the 'main cause' of visits to Antarctica.
There is no permanent population in Antarctica. It is a continent, not a country. Antarctica is far too hostile for humans to live all year around. There are however research facilities and similar structures in the Antarctica, which are operated by people (mainly scientists) from all over the world. So they all celebrate the traditional celebrations of their country of origin. Antarctica itself has no holidays.
Lake Antarctica and Lake Antarctica Junior.
All important dates and holidays happen in Antarctica, but it depends on who is there to celebrate them. There are no native or cultural holidays founded in Antarctic culture, because there is no Antarctic culture. Every person who lives there does so temporarily, because their government hired them to work in support of science.
You may be thinking of East Antarctica and West Antarctica.
What holidays are clebrated in Greece
The birth and death/resurrection of Christ are the main holidays for Christians - Christmas and Easter.
There is no main language in Antarctica. There are no people there, other than foreign scientists from all over the world.
Data about the health of planet earth is the main resource that can be found in Antarctica.