Calculated Field Based On Calendar Year

I have a Rollup field on an Account that gives the max date date from child records, let's call it Last Order Date.

I want to identify if the Last Order Date occurred in the last calendar year. So if the current date is August 8, 2016, I want a calculated field on the Account to set the value based on if the Last Order Date occurred in calendar year 2015.

Is there a way to do this other than somehow setting the start/end dates of the year through a transactional calculation like a workflow or plugin?