No. During Samvatsari and the associated fasting, one is urged to practice restraint (brahmacharya of the senses) and ahimsa (non-violence) toward the body and mind. Smoking involves harming the body and indulging the senses, which goes against the spirit of the fasting and the request for forgiveness and purification.

If you’re observing the fast, it’s best to refrain from smoking throughout the vrata, including midnight. You may focus on prayers, forgiveness (pratikraman), and simple, pure conduct instead.