That is a strike by the electricity company. It will not involve anybody not dealing with electric services that day. In fact, it will not involve anyone.

EDF = electricite de France

Those strike lists are so funny because 1) at least half of the strikes are called off before the strike day and 2) in most cases striking empployees represent fewer than 10% of the employees.

Why? Only 8% of French employees belong to a trade union, and there is no union obligation to obey a strike order.

The most recent RATP and SNCF strikes have caused between 0 and 10% disruption on most services. When there is an SNCF strike it is also very important to know whether it is local or national. For example, national SNCF strikes usually have absolutely no impact on the Paris metropolitan area, because the SNCF in this area has completely different rules and conditions from the rest of the country. That's why I find it both useless and possibly dangerous for visitors to consult the lists of so-called strikes, because they have none of the keys to understanding them.

Agree. It's far more useful to go to the SNCF site a day or so before you travel and check on the "perturbations" link for whatever lines you plan to use, or even just check for the part of the country you'll be in (NW, NE, SW, SE, Centre, etc.).