POTSDAM – Potsdam Public Library, 2 Park St., will host a class on aromatherapy for cold and flu season on Thursday, Feb. 13 at 6 p.m. Learn about different essential oils and aromatics that can help keep germs at bay and support clear breathing during cold and flu season. Info: https://potsdamlibrary.org/event/aromatherapy-for-cold-and-flu-season/ .