We own the certification ISO 9001v2008, what's the deadline to move to the version ISO 9001 v2015?

The revised standard was released in September 2015

You are allowed a transitioning period of upto (3) years. i,e before September 2018

-          Any ISO 9001:2008 / ISO 14001:2004 certificate renewal visit due ON OR after 14 March 2017 shall be carried out on the 2015 version.

-          Any valid ISO 9001:2008 / ISO 14001:2004 certificate between 14 March 2017 and 14 September 2018 needs to do the transition maximum at the last surveillance visit before the certificate renewal date.

-          Any remaining ISO 9001:2008 / ISO 14001:2004 certificates need to do the transition 3 months before 14 September 2018.

-          NO ISO 9001:2008 / ISO 14001:2004 certificates are valid after 14 September 2018.

 after 3 years so must be before  September-2018