Dear [Friend's Name],

I hope this letter finds you in good health and high spirits. I am writing to invite you to the Diwali celebration at my home. Diwali, also known as the Festival of Lights, is a significant Hindu festival celebrated with great enthusiasm and joy. It is a time when families come together, light diyas (oil lamps), burst firecrackers, and exchange gifts.

Introduction:
Diwali is one of the most awaited festivals in our country, and I would be delighted if you could join us in celebrating this auspicious occasion at my home. The festival falls on [date], and the celebrations will begin in the evening and continue late into the night.

Celebrations at my Home:
At my home, we have a tradition of decorating the entire house with colorful lights, rangoli (artistic designs made with colored powders), and flowers. The atmosphere is filled with joy and excitement, and I assure you that you will have a wonderful time.

Food and Sweets:
No Indian festival is complete without delicious food and sweets. My mother is an excellent cook, and she has planned a mouthwatering menu for the evening. We will be serving a variety of traditional Indian dishes, including sweets like gulab jamun, jalebi, and kheer. I am sure your taste buds will be delighted.

Activities and Entertainment:
Apart from enjoying the scrumptious food, we have planned several activities and entertainment for the evening. We will have a small puja (prayer) ceremony to seek the blessings of the deities, followed by a fun-filled session of playing cards and board games. We will also have a bonfire in our backyard, where we can gather around and share stories and laughter.

Conclusion:
I genuinely hope that you will be able to join us and be a part of our Diwali celebrations this year. It would mean a lot to me to have you by my side during this joyous occasion. Please let me know at your earliest convenience if you will be able to make it, so that we can make the necessary arrangements.

Looking forward to seeing you and celebrating together.

Warm regards,
[Your Name]