Does anybody knows the date eligible to apply for naturalisation is whether (5+1) years from the date of first entry of joining EEA family members in the UK? 

or one year after PR ( Permanent Resident Card) ? 

I joined my spouse on Feb.2009 on EEA Family member visa , got my PR on June 2014 and need one year to wait until I can apply , is this from one year from June or from Feb.? thanks for any good advise.