Answer
(Fatwa: 165/165/M=1433)
When you do not like birthday celebration then you must not be celebrating your birthday, so how your Hindu friend came to know about your birthday? Whatever clothes, watches etc your friend sends you as birthday gift, do not accept it in future and apologize your friend. However, making use of the gifts is not unlawful and haram for you, but a thing that is used in non-Islamic ritual involves some evil and abhorrence; therefore you should send it back or give it to any poor.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband