Metro service in the north-south corridor (Dakshineswar to Kavi Subhash) will begin at 2.30pm on March 18, on the occasion of Doljatra, authorities said in a statement on Tuesday.
The number of services has also been reduced to 29 for the festival of colours.
In the east-west corridor, the first Metro will leave the terminal stations (Phoolbagan and Salt Lake Sector V) at 3pm. 20 services will be run in the east-west corridor on Doljatra.