Eligibility date for Bonus:- date of joining or confirmation date?

I Just want to confirm about the bonus calculation. I have joined in my present company on 14.04.2017 and today i had a word with our HR person regarding bonus calculation as i heard from my fellow employees that the calculation is confusing. So on our discussion with HR it has been understand that the company will calculate bonus from the date of confirmation only and not from date of joining. The most funny thing is the HR will provide confirmation up on their will and mind. In my case it was happened only after 6.5 months i.e on 01.11.2017. So kindly help me to clear the doubt of whether this practice is lawful or employee can demand for bonus from date of joining itself.
thanks & regards,
Anish Kumar

Dear Anish Kumar,
Your company is wrong. The bonus entitlement starts from date of joining and not on confirmation.
If you are not falling under the Payment of Bonus Act and still company wish to consider bonus to you, the company can have its own terms and conditions.