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.
However, the timings for the last Metro remain unchanged for both the Kolkata Metro corridors.
The first service on March 19 will be at 7am as usual and the number of services will be 208 on the occasion of Holi.
