Hello Simmi Sharma,

I would like to mention the dates of JEE MAINS April 2019 below which are mentioned on the careers360's site.

• Release of Application Form-February 8, 2019
• Final Date to Submit Filled Application Form of JEE Main April 2019-March 7, 2019
• Release of Admit Card-March 18, 2019
• Result of JEE Main April 2019-April 30, 2019

For more detailed info , I would suggest you to visit the below given careers360's link which will give you a good report.

The link for the same is:https://engineering.careers360.com/articles/jee-main-april

Hope this helps and all the very best to you!