In a Nutshell™ Section 1.3: Section 1.3 “Banking Day” means, for any city, a day on which commercial banks there are open. view template 2006 ISDA Definitions: The full text of Section 1.3: Section 1.3 Banking Day. “Banking Day” means, in respect of any city, any day on which commercial banks are open for general business (including dealings in foreign exchange and foreign currency deposits) in that city. view template