Parliament's Special Session will commence on September 18 in the old building and will be later moved to the new building on September 19 on the occasion of Ganesh Chaturthi, reported news agency ANI. Former Congress president Sonia Gandhi on Wednesday wrote a letter to Prime Minister Narendra Modi and said that it was disappointing that the Centre  convened Parliament's special session without sharing the agenda or deliberating with the opposition parties. 

However, the Congress said that it will not boycott the Special Session as it was a good opportunity to raise issues concerning the people of the country and the INDIA bloc will try to bring up an array of issues through different opposition parties. 

"A meeting of the Parliamentary Strategy Group met on Tuesday and it was chaired by Sonia Gandhi, which was also attended by Congress President Mallikarjun Kharge to discuss the agenda for Parliament Special Session. Later Kharge called the meeting of floor leaders of INDIA from Lok Sabha and Rajya Sabha and the strategy of INDIA in the session was discussed," Congress MP Jairam Ramesh said. 

The agenda of the five-day Special Session has not been made clear yet. It was announced by Union Parliamentary Affairs Minister Pralhad Joshi. 

"I must point out that this Special Session has been convened without any consultation with other political parties. None of us have any idea of its agenda," Sonia Gandhi wrote in the letter. 

"All we have been communicated is that all five days have been allocated for Government Business. We most certainly want to participate in the Special Session because it will give us an opportunity to raise matters of public concern and importance," she added. 

The monsoon session of the Parliament which concluded last month was held in the old Parliament building. The announcement of the special session came as a surprise in the political circles amid preparations for five assembly elections scheduled to be held later this year.  

Meanwhile, the Centre has constituted an eight-member committee to examine and make recommendations for holding "one election" in the country.