Kumar said he thanked the Prime Minister for the wishes on his birthday.
He was also greeted by members of Assembly.
Leader of Opposition Prem Kumar and senior BJP member Nand Kishore Yadav joined members of the treasury bench in wishing Kumar on his birthday.
Later, Speaker Vijay Kumar Chaudhary also wished the Chief minister.
After the House was adjourned till 2 PM, legislators visited Kumar in his Assembly chamber and wished him.
Finance Minister Abdul Bari Siddiqui, Education Minister Ashok Choudhary and Parliamentary Affairs Minister Shrawan Kumar joined a host of legislators of JD(U), RJD and Congress to greet the Chief Minister.