National No Smoking Day is observed in Ireland on Ash Wednesday, which marks the beginning of Lent in Western Christianity. This annual observance encourages individuals to quit smoking, as Lent is a time for abstaining from luxuries, and smoking is viewed as such. On this day, even those who do not typically fast are encouraged to give up smoking, often serving as a first step towards quitting. In Ireland, smoking is prohibited in indoor workplaces, healthcare and education facilities, public transport, and enclosed public places, including bars and restaurants. The country has also banned tobacco advertising and the display of tobacco products in stores, making No Smoking Day a part of a broader anti-tobacco campaign. Similar observances occur worldwide, including No Smoking Day in the UK and the Great American Smokeout in the United States.