1- The biggest difference between the celebration of Independence Day and Republic Day is that the Indian flag is hoisted on August 15Whereas the flag is hoisted on 26 January. These seemingly identical phenomena are in fact very different from each other.
Flag hoisting occurs when the tied flag is pulled from the bottom up and placed on the pole and then it is hoisted. On 26 January, the flag is tied on the pole and opened in the same way. Actually, on August 15, the British flag came down and our tricolor was unfurled. Since then this ritual is being performed.
2- The Prime Minister of India hoists the flag during the 15th August event, while the President performs the rituals on 26th January.
The reason for this is that the country became independent in 1947. The Prime Minister is the political head of the country while the President is the constitutional head.
In 1947, we had a Prime Minister in Jawaharlal Nehru, but then the President could not be elected. The flag was hoisted for the first time on 26 January 1950 by Dr. Rajendra Prasad as the President.
3- The program of Independence Day is organized at Red Fort, while on Republic Day, the program is organized at Rajpath.