The bench of Justice Md Emdadul Huq and Justice FRM Nazmul Ahasan fixed the date on Thursday following the end of the hearing.
Earlier, the HC deferred the date of announcing verdict on the writ petition several times.
Nizam was supposed to serve a jail term in a firearms case until September 13, 2010 and was to be disqualified from contesting a parliamentary election for the following five years, as per the constitution. But he became a lawmaker after participating in the January 5, 2014 elections.
Feni Jubo League leader Sakhawat Hossain Bhuiyan filed the petition after a Bangla daily reported that Hazari was allegedly released from jail illegally. The petition mentioned that on August 16, 2000, a Chittagong court sentenced Nizam to 10 years in jail in the case but he was released after serving only five.
Although he appealed against the verdict with the High Court and the Appellate Division, these were dismissed, said the plea. Even his review petition was rejected.
On June 8, 2014, a High Court in a rule asked the government, the Election Commission and Hazari to explain in four weeks why the constituency should not be declared vacant.
Finally, the bench started the hearing on January 19 this year.