So on May 31, 2016 will be the AGSM. And we know about it via SEDAR: http://sedar.com/CheckCode.do;jsessionid=0000G8twWwIi0t6au4BbChTrQOx:1884ter20
The date is not written on POET's website
see http://www.poet-technologies.com/agm2015/
and correct me, if I am wrong: there was no NR about it.
But the record date for notice and the record date for voting is today, April 15, 2016.
Last time, for the AGSM 2015, there was a NR announcing all the dates: http://www.poet-technologies.com/poet-technologies-annual-general-special-shareholders-meeting-2/