Modi, who is currently in Germany as part of his three nation tour, posted greetings in Assamese, Bangla, Odia, Punjabi, Malayalam and Tamil. He also tweeted in English.
"Good wishes to my fellow Indians on the various festivals being celebrated across India. May these festivals bring joy in everyone's lives," he said.
His tweet in Assamese said, "On Bohag Bihu, heartfelt greetings to my sisters and brothers of Assam."
In a message in Bangla, Modi reached out to Bengalis saying, "On Poila Boishakh my greetings to all Bengali friends. Have a great year ahead, Shubho Nabo Barsho."
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"Wishing all my Odia sisters and brothers on Maha Vishuba Sankranti. I pray for a wonderful year ahead, full of prosperity and joy," he said in his tweets to people from Kerala and Odisha.
"Baisakhi greetings to everyone! May this festival enrich the spirit of harmony and happiness in society.
"My best wishes to my Tamil friends on Puthandu. I pray that the coming year marks the fulfillment of all your wishes & brings happiness," he tweeted in Punjabi and Tamil.