How long can one stay in India after getting Visa?

[andhrawala]

Hi,

What is the latest a person can start from India after getting a visitor Visa?

Is there a deadline or duaration within which a person has to come to the US?

My in-laws got a 10 yr visa. Whats the deadline in their situation?

Thanks in advance

[immihelp]

She can visit at any time within those 10 years, even on last day.