By this time next year I may well have (change the verb form) ...

By this time next year I may well have .........

Period: Jan 15, 2015 to Jan 15, 2016

... buy a car

Feb 19, 2015

... change job

Mar 19, 2015

... have a birthday

Apr 19, 2015

... win the lottery

May 19, 2015

... get married

Jun 19, 2015

... run a marathon

Jul 19, 2015

... climb Mount Fuji

Aug 19, 2015

... rob a bank

Sep 19, 2015

... get divorced

Oct 19, 2015

... write my autobography

Nov 19, 2015

... pass my Diploma

Dec 19, 2015