Help determining the tax home establish DATE for form 2555 - moved to foreign country

[LO2012]

Moved to Europe in Summer 2012 but continued working for same USA co. The only work i had w/ income up to 2013. Then I became a student with 0  income for 2014 & 2015, so did not file for those years, then had a little income for 2016 (student internship). I have been a resident since mid-2012 but for 2016 filing what date should I use as "tax home establish date" for form 2555?  Is Jan 1, 2014 correct? since I residence here even if no income, or should it be before? I considered the USA as tax home for both 2012 & 2013.

[pk]

for 2016 tax year, form 2555 would accept 01/01/2016 as start  and 12/31/2016 as end of the 12 month test period