What is a Jacobean year? 16 July, 2015 admin These are years in which St. James’ Day (July 25) falls on a Sunday. Jacobean years occur cyclically every 6, 5, 6 and 11 years. The last was in 2010 and the next will be in 2021. About Author admin Previous postIs the route is well signposted?Next postWhat is a “Compostela”?