All holidays have limited importance for graduate students. Or, rather, holidays are the best opportunity to work on the independent research which is meant to be the reason for being in grad school, as teaching and other duties tend to somewhat abate.
An ambitious aim would be to complete all the parts of the survey for my PhD thesis which can be done using open source information, since I am still working on Research Ethics Board approval to begin talking to people.
The best of luck to you.