Hello Karan,

I would like to tell you that WBJEE 2019 Paper I (Mathematics) would be held on May 26, 2019 and WBJEE 2019 Paper II (Physics & Chemistry) will be held on May 26, 2019.

I would suggest you to visit the careers360's link givenbelow which has  a detailed explanation of the important dates for WBJEE.

The link for the same is:https://engineering.careers360.com/articles/wbjee-important-dates

Hope this helps and all the very best to you!