Modi, who is celebrating his first birthday after becoming the Prime Minister, went to Gandhinagar, 23 km from Ahmedabad, alone without any security to meet his mother Hiraben. Gujarat Chief Minister Anandiben Patel 'saluted' the Prime Minister's mother Hiraben.
On the occasion, she donated Rs 5000 for the Prime Minister's Relief Fund for flood-hit Jammu and Kashmir, they said.
95-year-old Hiraben enquired about his health and work as Prime Minister and offered him sweets on the occasion. Modi spent 15 minutes with her.
Every year on his birthday, Modi has been taking her blessings. This is his first visit to the home state after becoming the Prime Minister almost four months ago.
Modi is in Gujarat to welcome Chinese President Xi Jinping who will be arriving here this afternoon.
International and national leaders also greeted him on the occasion.
The Chinese President was among those who wished the Prime Minister on the occasion.
Chinese Ambassador to India Le Yucheng met the Prime Minister at the Raj Bhavan in Gandhinagar this morning and conveyed the best wishes of the President and top Chinese leadership to him on the occasion.
The Prime Minister also received best wishes from his Japanese counterpart Shinzo Abe, in a reflection of the special bonding the two Prime Ministers enjoy.
Modi visited Japan only a fortnight back and the warmth between the two leaders was at display during that time.
President Pranab Mukherjee and Vice President Hamid Ansari also called Modi to wish him.
In a tweet, Patel said, "On the occasion of his b'day, I salute Prime Minister Narendra Modi's mother Hiraben for giving us a nationalist son".
Patel posted a photograph of Modi with his mother and also visited Rajbhavan this morning to personally greet Modi on his birthday, an official said.
A host of leaders from Tamil Nadu, including Governor K Rosaiah, Chief Minister Jayalalithaa and DMK chief M Karunanidhi, also greeted the Prime Minister.
In her greetings to Modi, Jayalalithaa said she prayed for many more years of good health for him to serve the nation.
Karunanidhi greeted the Prime Minister on behalf of DMK, asking him to "accept my hearty wishes."
BJP's Tamil Nadu allies, DMDK and MDMK also greeted Modi.
Hailing Modi's administration skills, DMDK founder and Opposition Leader in Tamil Nadu Assembly, Vijayakanth said he prayed for long life for the Prime Minister.
In his greetings to Modi, MDMK founder Vaiko wished the "Goddess of nature to shower all her blessings to you for long long life to achieve success in all your endeavours (in) taking our country to great heights."
Modi, who is celebrating his first birthday after becoming the Prime Minister, went to Gandhinagar, 23 km from Ahmedabad, alone without any security to meet his mother Hiraben.
Gujarat Chief Minister Anandiben Patel 'saluted' the Prime Minister's mother Hiraben.