HELLO MY FRIEND YOUR ANSWER IS "आपको और आपके पूरे परिवार को दिवाली कि बहुत-बहुत शुभकामनाए".

aapko aur aapke parivaar ko diwaali ki shubhkaamnayein or instead of shubhkaamnayein , which is not reaally a word used in geeneral , as colloqial , but more bookish , say badhhayiyaan or in india we usually say haappy diwali , onle thing indian about is the hindi accent ha ha