Republic Day is celebrated on 26th January every year in India. It marks the day when the Constitution of India came into effect in 1950.

History:
• India became independent from British rule on 15th August 1947.
• The Constitution of India was drafted by the Constituent Assembly which consisted of elected representatives from all parts of India.
• The Constitution was adopted on 26th November 1949, but it came into effect on 26th January 1950.

Celebrations:
• The main celebration is held in the national capital, New Delhi, where a grand parade is held at Rajpath.
• The President of India hoists the national flag and addresses the nation.
• The parade includes displays of the country's cultural and military heritage, as well as floats representing different states and union territories.
• School children and various cultural groups participate in the parade.
• The parade ends with a display of fireworks.

Importance:
• Republic Day is a national holiday in India.
• It is celebrated to honor the day when India became a republic, a day when the people of India became the rulers of the country.
• It is a reminder of the values enshrined in the Constitution, such as democracy, equality, and justice for all.
• It is an occasion to celebrate the country's cultural diversity and rich heritage.

This completed India's movement towards becoming an independent republic with a democratic government system. January 26 was also selected as the day to mark Republic Day because it had been on this day that the Indian National Congress (INC) proclaimed the Declaration of Indian Independence in 1929.