John Molson. Since 1786. 21 Means 21. Our passion for quality beer began in 1786 when John Molson offered his first brew in Montreal. The continent's oldest brewery still stands. And today we're proud to export our premium beers from Canada to territories around the globe. Molson Canadian Light. The definitive light lager from a cold, clean, pristine land. Notable for its smooth, easy-drinking nature.