For a few years now, several countries are organising numerous commemoration that are linked to the Centenary of the First World War. It is probably one of the first, if not the first, large commemoration in the era of social networks on-line. New practices are emerging on social networks on-line during ceremonies and, as a consequence, the collective memory studies field may be renewed by the use of big data.
Based on research using data from Twitter, we will try to illustrate those new commemoration practices, notably through the French example and the activity on Twitter around the “base de données des morts pour la France”.
We will also sketch some conclusions on how we should consider using Big Data for our research. It is not only about a big data turn for humanities and social sciences. It is also about a humanities and social sciences turn for big data.