The decision was taken in the meeting of the Left Front Committee held here today, MP and party chairman Khagen Das said.
CPI-M party secretary Bijan Dhar said the incumbent Manik Sarkar will remain the CM of the seventh Left Front government.
Das said the MLAs will take the oath of office and secrecy on March 6 at the Raj Bhavan and the LF will organise its victory rally here on March 7.
The LF has stormed back to power for the fifth consecutive term since 1993, bagging 50 out of the 60 seats.