INDIA - REPUBLIC DAY January 26:   Observed as Republic Day of India - a National Holiday in India. January 26, 1950:   The Constitution of India came into force on this day.  The said constitution of India replaced the Government of India Act, 1935 as the governing document of India.   January 26, 2015:   For the first time in the history of independent India, the President of USA, Mr. Barrack Obama, was the chief guest at the Republic Day parade in New Delhi, India. The first lady of USA, Michelle Obama, also graced this occasion.