A strike is planned in France the Thursday 19/01 due to the pension reform.
The strike will start from 18/01 at 19h00 until 20/01 at 5h00. This strike will be closely followed and most of the signal boxes will be closed.
All the trains will be deregulated during this period, some of them will be able to run provided all signal boxes are open.
In the end, most of the international trains will be canceled during this period.