Why do we celebrate Republic Day on Jan 26, what will be different this year?

From 1950 we always celebrate 26 January as a republic day because the constitution of India came into existence on this day.The constitution of India was take on by the Indian Constituency Assembly on 26 November 1949 and came into existence on 26 January 1950.This year we will be celebrating 73rd republic day in 2022 people do many things to make this day special and remember our heroes who sacrifice their lives for the nation.