How to Quit Smoking During Ramadan Ramadan is a time of reflection and change and this year it begins on the evening of February 17th. Smoking and vaping are not permitted during fasting hours and because of Smoking and vaping in Ramadan: Does it break the fast? Does Vaping Break Your Fast?, Sayyid Kashmiri explains that, according to Sayyid Sistani, both vaping and smoking invalidate the fast as a matter of obligatory precaution.