Hi <Manager>


I’m planning for a planned leave on occasion of my marriage. Marriage is on April 24 (Wednesday)

I request you to accept my leave on these specified dates, i.e., April 12 – May 5 , will be joining back on work from May 6 (Monday)

Thanks for your consideration of my request.

Regards,

<YOU>

anonymousHi

That is not business-like language. It is for your friends and family.

anonymousI’m planning for a planned leave

Don't use "plan" twice in succession.

anonymousMarriage is on April 24 (Wednesday)

My marriage ...

anonymouswill be joining back on work

I will return to work...


Also, your punctuation is incorrect in many places.