Smoking prevalence remains high in France (28.8% of French adults were daily smokers in 2015). In November 2016, Santé publique France, the French National Public Health Agency, launched a national campaign aimed at encouraging smokers to quit: "Moi(s) sans tabac." This campaign was inspired by the British "Stoptober," which led to 350,000 additional attempts to quit in 2012. "Moi(s) sans tabac" sets a goal for smokers to remain smoke-free for one month. After this period, smokers are five times more likely to become permanent ex-smokers. The campaign is based on social contagion theory and the PRIME theory of motivation. The evaluation of the project consists of a process evaluation and an effectiveness evaluation. The primary outcome measure for effectiveness is the number of quit attempts in the last quarter of 2016.