As you have asked about the Tamil Nadu Public Service Commission (TNPSC) group 2 exam dates, I am giving you information about it, check below for the details

You can refer to the Annual Planner of the TNPSC to get the details.
To get to it
Follow steps given below

Go to TNPSC website
Place cursor on Examination
Click on Annual Planner,
The page open look like



Here click on the planner.
PDF file be opened.
You can save the file for future use.
You can also download the file from here.
To download refer to the attached file
(TNPSC Annual Planner)

http://www.tnpsc.gov.in/docu/Annual%...29_01_2016.pdf