New Delhi: Prime Minister Narendra Modi on Thursday took to Twitter to wish his good friend and Bihars dynamic Chief Minister Nitish Kumar on his 67th birthday. Birthday wishes to my friend and Bihars dynamic CM Shri @NitishKumar Ji. He has always served our nation with great diligence and his role in transforming Bihar is particularly noteworthy. I pray for Nitish Ji long life and good health, the PM tweeted.